Climate change mitigation

Wayback Machine Paris Agreement Carbon dioxide removal
Coal, oil, and natural gas remain the primary global energy sources even as renewables have begun rapidly increasing.[1]
The Climate Change Performance Index ranks countries by greenhouse gas emissions (40% of score), renewable energy (20%), energy use (20%), and climate policy (20%).

Climate change mitigation consists of actions to limit the magnitude or rate of global warming and its related effects.[2] This generally involves reductions in human emissions of greenhouse gases (GHGs).[3]

Fossil fuels account for about 70% of GHG emissions.[4] The main challenge is to eliminate the use of coal, oil and gas and substitute these fossil fuels with clean energy sources. Due to massive price drops, wind power and solar photovoltaics (PV) are increasingly out-competing oil, gas and coal[5] though these require energy storage and extended electrical grids. Mitigation or reversal of climate change, may also be achieved by replacing petrol and diesel with electric vehicles, reforestation and forest preservation (a "carbon sink"),[3] changes to agriculture practice and machinery, divestment from fossil fuel finance, democratic corporate governance reforms, changes to consumer laws, and implementing a green recovery after the COVID-19 pandemic.[6] There is not yet technology for removing carbon dioxide from Earth's atmosphere,[3][7] or climate engineering at safe or sufficient scale.[8]

Almost all countries are parties to the United Nations Framework Convention on Climate Change (UNFCCC).[9] The ultimate objective of the UNFCCC is to stabilize atmospheric concentrations of GHGs at a level that would prevent dangerous human interference with the climate system.[10] In 2010, Parties to the UNFCCC agreed that future global warming should be limited to below 2 °C (3.6 °F) relative to the pre-industrial level.[11] With the Paris Agreement of 2015 this was confirmed.

With the Special Report on Global Warming of 1.5 °C, the International Panel on Climate Change has emphasized the benefits of keeping global warming below this level, suggesting a global collective effort that may be guided by the 2015 United Nations Sustainable Development Goals.[12] Emissions pathways with no or limited overshoot would require rapid and far-reaching transitions in energy, land, urban and infrastructure including transport and buildings, and industrial systems.[13]

The current trajectory of global greenhouse gas emissions does not appear to be consistent with limiting global warming to below 1.5 or 2 °C.[14][15][16] However, globally the benefits of keeping warming under 2 °C exceed the costs.[17]

Greenhouse gas concentrations and stabilization

refer to caption and adjacent text
Stabilizing CO2 emissions at their present level would not stabilize its concentration in the atmosphere.[18]
refer to caption and adjacent text
Stabilizing the atmospheric concentration of CO2 at a constant level would require emissions to be effectively eliminated.[18]

The UNFCCC aims to stabilize greenhouse gas (GHG) concentrations in the atmosphere at a level where ecosystems can adapt naturally to climate change, food production is not threatened, and economic development can proceed in a sustainable fashion.[19] Currently human activities are adding CO2 to the atmosphere faster than natural processes can remove it.[18] According to a 2011 US study, stabilizing atmospheric CO2 concentrations would require anthropogenic CO2 emissions to be reduced by 80% relative to the peak emissions level.[20][needs update]

The IPCC works with the concept of a fixed carbon emissions budget. If emissions remain on the current level of 42 GtCO
, the carbon budget for 1.5°C could be exhausted in 2028.[21] The rise in temperature to that level would occur with some delay between 2030 and 2052.[22]. Even if it was possible to achieve negative emissions in the future, 1.5°C must not be exceeded at any time to avoid the loss of ecosystems.[23]

After leaving room for emissions for food production for 9 billion people and to keep the global temperature rise below 2 °C, emissions from energy production and transport will have to peak almost immediately in the developed world and decline at about 10% each year until zero emissions are reached around 2030.[24][25][26][27][needs update]

Sources of greenhouse gas emissions

GHG emissions 2018
without land-use change
using 100 year GWP[28]

by fossil fuel (72%)
  CH4 methane (19%)
nitrous oxide (6%)
  Fluorinated gases (3%)

emissions by fuel type[29]

  coal (40%)
  oil (34%)
  gas (21%)
  cement (4%)
  flaring (1%)

With the Kyoto Protocol, the reduction of almost all anthropogenic greenhouse gases has been addressed.[30] These gases are CO2, methane (CH4), nitrous oxide (N2O) and fluorinated gases (F-Gases): the hydrofluorocarbons (HFC), perfluorocarbons (PFC), and sulfur hexafluoride (SF6). Their global warming potential (GWP) depends on their lifetime in the atmosphere. Methane has a relatively short atmospheric lifetime of about 12 years but a high immediate impact.[31] For methane, a reduction of about 30% below current emission levels would lead to a stabilization in its atmospheric concentration, while for N2O, an emissions reduction of more than 50% would be required.[18] Estimations largely depend on the ability of oceans and land sinks to absorb GHGs. The risk of feedback effects in global warming leads to high uncertainties in the determination of GWP values.

Carbon dioxide (CO

Methane (CH4)

Nitrous oxide (N



Projections of future greenhouse gas emissions are highly uncertain.[37] In the absence of policies to mitigate climate change, GHG emissions could rise significantly over the 21st century.[38] Current scientific projections warn of a 4.5 degree temperature rise in decades.[39]

Methods and means

We cannot be radical enough in dealing with those issues that face us at the moment. The question is what is practically possible.

David Attenborough, in testimony to the UK House of Commons Business, Energy and Industrial Strategy Committee.[40]

As the cost of reducing GHG emissions in the electricity sector appears to be lower than in other sectors, such as in the transportation sector, the electricity sector may deliver the largest proportional carbon reductions under an economically efficient climate policy.[41]

Economic tools can be useful in designing climate change mitigation policies.[42] Abolishing fossil fuel subsidies is very important but must be done carefully to avoid making poor people poorer.[43]

Other frequently discussed means include efficiency, public transport, increasing fuel economy in automobiles (which includes the use of electric hybrids), charging plug-in hybrids and electric cars by low-carbon electricity, making individual changes,[44] and changing business practices. Replacing gasoline and diesel vehicles with electric means their emissions would be displaced away from street level, where they cause illness.

Another consideration is how future socioeconomic development proceeds.[45]

Fossil fuel substitution

As most greenhouse gas emissions are due to fossil fuels, rapidly phasing out oil, gas and coal is critical.[46] The incentive to use 100% renewable energy has been created by global warming and other ecological as well as economic concerns.[47] According to the IPCC, there are few fundamental technological limits to integrating a portfolio of renewable energy technologies to meet most of total global energy demand.[48]

The global primary energy demand was 161,320 TWh in 2018.[49] This refers to electricity, transport and heating including all losses. The primary energy demand in a low-carbon economy is difficult to determine. In transport and electricity production, fossil fuel usage has a low efficiency of less than 50%. Motors of vehicles produce a lot of heat which is wasted. Electrification of all sectors and switching to renewable energy can lower the primary energy demand significantly. On the other hand, storage requirements and reconversion to electricity lower the efficiency of renewable energy.

In 2018, biomass and waste was listed with a share of 10% of primary energy, hydro power with 3%. Wind, solar energy and other renewables were at 2%.[49]

Low-carbon energy sources

Wind and sun can be sources for large amounts of low-carbon energy at competitive production costs. Solar PV module prices fell by around 80% in the 2010s, and wind turbine prices by 30–40%.[50] But even in combination, generation of variable renewable energy fluctuates a lot. This can be tackled by extending grids over large areas with a sufficient capacity or by using energy storage. According to the International Renewable Energy Agency (IRENA), the deployment of renewable energy would have to be accelerated six-fold though to stay under the 2 °C target.[51] Load management of industrial energy consumption can help to balance the production of renewable energy production and its demand. Electricity production by biogas and hydro power can follow the energy demand.

Solar energy

The 150 MW Andasol solar power station is a commercial parabolic trough solar thermal power plant, located in Spain. The Andasol plant uses tanks of molten salt to store solar energy so that it can continue generating electricity for 7.5 hours after the sun has stopped shining.[52]

Wind power

The Shepherds Flat Wind Farm is an 845 megawatt (MW) nameplate capacity, wind farm in the US state of Oregon, each turbine is a nameplate 2 or 2.5 MW electricity generator.

Regions in the higher northern and southern latitudes have the highest potential for wind power.[55] Installed capacity has reached 650 GW in 2019. Offshore wind power currently has a share of about 10% of new installations.[56] Offshore wind farms are more expensive but the units deliver more energy per installed capacity with less fluctuations.

Hydro Power

The 22,500 MW nameplate capacity Three Gorges Dam in the People's Republic of China, the largest hydroelectric power station in the world.

Hydroelectricity plays a leading role in countries like Brazil, Norway and China:[57] but there are geographical limits and environmental issues.[58] Tidal power can be used in coastal regions.


Biogas plants can provide dispatchable electricity generation, and heat when needed.[59] A common concept is the co-fermentation of energy crops mixed with manure in agriculture. Burning plant-derived biomass releases CO
, but it has still been classified as a renewable energy source in the EU and UN legal frameworks because photosynthesis cycles the CO
back into new crops. How a fuel is produced, transported and processed has a significant impact on lifecycle emissions. Transporting fuels over long distances and excessive use of nitrogen fertilisers can reduce the emissions savings made by the same fuel compared to natural gas by between 15 and 50 per cent.[60] Renewable biofuels are starting to be used in aviation.

Nuclear power

In most 1.5 °C pathways nuclear power increases its share.[61] The main{{[[[IPCC SR15 Ch2 2018|61]]]|date=April 2020|reason=I thought new nuclear was supposed to be flexible}} advantage is the ability to deliver large amounts of base load. It has been repeatedly classified as a climate change mitigation technology.[62]

On the other hand, nuclear power comes with environmental risks which could outweigh the benefits. Apart from nuclear accidents, the disposal of radioactive waste can cause damage and costs over more than one million years. Separated plutonium could be used for nuclear weapons.[63][64] Public opinion about nuclear power varies widely between countries.[65][66]

As of 2019 the cost of extending nuclear power plant lifetimes is competitive with other electricity generation technologies, including new solar and wind projects.[67] New projects are reported to be highly dependent on public subsidies.[68]

Nuclear fusion research, in the form of the International Thermonuclear Experimental Reactor is underway but fusion is not likely to be commercially widespread before 2050.[69]

Carbon neutral and negative fuels

Fossil fuel may be phased-out with carbon-neutral and carbon-negative pipeline and transportation fuels created with power to gas and gas to liquids technologies.[70][71][72]

Natural gas

Natural gas, which is mostly methane, is viewed as a bridge fuel since it produces about half as much CO
as burning coal.[73] Gas-fired power plants can provide the required flexibility in electricity production in combination wind and solar energy.[74] But methane is itself a potent greenhouse gas, and it currently leaks from production wells, storage tanks, pipelines, and urban distribution pipes for natural gas.[75] In a low-carbon scenario, gas-fueled power plants could still continue operation if methane was produced using power-to-gas technology with renewable energy sources.

Energy storage

Wind energy and photovoltaics can deliver large amounts of electric energy but not at any time and place. One approach is the conversation into storable forms of energy. This generally leads to losses in efficiency. A study by Imperial College London calculated the lowest levelised cost of different systems for mid-term and seasonal storage. In 2020, pumped hydro (PHES), compressed air (CAES) and Li-on batteries are most cost effective depending on charging rhythm. For 2040, a more significant role for Li-on and hydrogen is projected.[76]

Super grids

Long distance power lines help to minimize storage requirements. A large network can smoothen variations of wind energy. With a global grid, even photovoltaics could be available all day and night. The strongest High-voltage direct current (HVDC) connections are quoted with losses of only 1.6% per 1000 km[84] HVDC is currently only used for point-to-point connections.

China has built many HVDC connections within the country and supports the idea of a global, intercontinental grid as a backbone system for the existing national AC grids.[85] A super grid in the USA in combination with renewable energy could reduce GHG emissions by 80%.[86]

Smart grid and load management

Instead of expanding grids and storage for more power, there are a variety of ways to affect the size and timing of electricity demand on the consumer side. Identifying and shifting electrical loads can reduce power bills by taking advantage of lower off-peak rates and flatten demand peaks. Traditionally, the energy system has treated consumer demand as fixed and used centralised supply options to manage variable demand. Now, better data systems and emerging onsite storageand generation technologies can combine with advanced, automated demand control software to pro-actively manage demand and respond to energy market prices.[87]

Time of use metering is a common way to motivate electricity users to reduce their peak load consumption. For instance, running dishwashers and laundry at night after the peak has passed, reduces electricity costs.

Dynamic demand plans have devices passively shut off when stress is sensed on the electrical grid. This method may work very well with thermostats, when power on the grid sags a small amount, a low power temperature setting is automatically selected reducing the load on the grid. For instance millions of refrigerators reduce their consumption when clouds pass over solar installations. Consumers need to have a smart meter in order for the utility to calculate credits.

Demand response devices can receive all sorts of messages from the grid. The message could be a request to use a low power mode similar to dynamic demand, to shut off entirely during a sudden failure on the grid, or notifications about the current and expected prices for power. This allows electric cars to recharge at the least expensive rates independent of the time of day. Vehicle-to-grid uses a car's battery or fuel cell to supply the grid temporarily.

Decarbonization of transport

Between a quarter and three-quarters of cars on the road by 2050 are forecast to be electric.[88]

Hydrogen can be a solution for long-distance transport by trucks and hydrogen-powered ships where batteries alone are too heavy.[89][90] Passenger cars using hydrogen are already produced in small numbers. While being more expensive than battery powered cars, they can refuel much faster, offering higher ranges up to 700 km.[91] The main disadvantage of hydrogen is the low efficiency of only 30%. When used for vehicles, more than twice as much energy is needed compared to a battery powered electric car.[92]

Although aviation biofuel is used somewhat, as of 2019 decarbonisation of aviation by 2050 is claimed to be "really difficult".[93]

Decarbonization of heating

The buildings sector accounts for 23% of global energy-related CO2 emissions[94] About half of the energy is used for space and water heating.[95] A combination of electric heat pumps and building insolation can reduce the primary energy demand significantly. Generally, electrification of heating would only reduce GHG emissions if the electric power comes from low-carbon sources. A fossil-fuel power station may only deliver 3 units of electrical energy for every 10 units of fuel energy released. Electrifying heating loads may also provide a flexible resource that can participate in demand response to integrate variable renewable resources into the grid.

Heat pump

Outside unit of an air-source heat pump

A modern heat pump typically produces around three times more thermal energy than electrical energy consumed, giving an effective efficiency of 300%, depending on the coefficient of performance. It uses an electrically driven compressor to operate a refrigeration cycle that extracts heat energy from outdoor air and moves that heat to the space to be warmed. In the summer months, the cycle can be reversed for air conditioning. In areas with average winter temperatures well below freezing, ground source heat pumps are more efficient than air-source heat pumps. The high purchase price of a heat pump compared to resistance heaters may be offset when air conditioning is also needed.

With a market share of 30% and clean electricity, heat pumps could reduce global CO
emissions by 8% annually.[96] Using ground source heat pumps could reduce around 60% of the primary energy demand and 90% of CO
emissions of natural gas boilers in Europe in 2050 and make handling high shares of renewable energy easier.[97] Using surplus renewable energy in heat pumps is regarded as the most effective household means to reduce global warming and fossil fuel depletion.[98]

Electric resistant heating

Radiant heaters in households are cheap and wide-spread but less efficient than heat pumps. In areas like Norway, Brazil, and Quebec that have abundant hydroelectricity, electric heat and hot water are common. Large scale hot water tanks can be used for demand-side management and store variable renewable energy over hours or days.

Energy conservation

Reducing energy use is seen as a key solution to the problem of reducing greenhouse gas emissions. According to the International Energy Agency, improved energy efficiency in buildings, industrial processes and transportation could reduce the world's energy needs in 2050 by one third, and help control global emissions of greenhouse gases.[99]

Energy efficiency

Efficiency covers a wide range of means from building insulation to public transport. The cogeneration of electric energy and district heat also improves efficiency.

Lifestyle and behavior

The IPCC Fifth Assessment Report emphasises that behaviour, lifestyle, and cultural change have a high mitigation potential in some sectors, particularly when complementing technological and structural change.[100]:20 Examples would be heating a room less or driving less. In general, higher consumption lifestyles have a greater environmental impact. The sources of emissions have also been shown to be highly unevenly distributed, with 45% of emissions coming from the lifestyles of just 10% of the global population.[101] Several scientific studies have shown that when relatively rich people wish to reduce their carbon footprint, there are a few key actions they can take such as living car-free (2.4 tonnes CO2), avoiding one round-trip transatlantic flight (1.6 tonnes) and eating a plant-based diet (0.8 tonnes).[102]

These appear to differ significantly from the popular advice for "greening" one's lifestyle, which seem to fall mostly into the "low-impact" category: Replacing a typical car with a hybrid (0.52 tonnes); Washing clothes in cold water (0.25 tonnes); Recycling (0.21 tonnes); Upgrading light bulbs (0.10 tonnes); etc. The researchers found that public discourse on reducing one's carbon footprint overwhelmingly focuses on low-impact behaviors, and that mention of the high-impact behaviors is almost non-existent in the mainstream media, government publications, school textbooks, etc.[102][103][104]

Scientists also argue that piecemeal behavioural changes like re-using plastic bags are not a proportionate response to climate change. Though being beneficial, these debates would drive public focus away from the requirement for an energy system change of unprecedented scale to decarbonise rapidly.[105]

Dietary change

Overall, food accounts for the largest share of consumption-based GHG emissions with nearly 20% of the global carbon footprint, followed by housing, mobility, services, manufactured products, and construction. Food and services are more significant in poor countries, while mobility and manufactured goods are more significant in rich countries.[106]:327 The widespread adoption of a vegetarian diet could cut food-related greenhouse gas emissions by 63% by 2050.[107] China introduced new dietary guidelines in 2016 which aim to cut meat consumption by 50% and thereby reduce greenhouse gas emissions by 1 billion tonnes by 2030.[108] A 2016 study concluded that taxes on meat and milk could simultaneously result in reduced greenhouse gas emissions and healthier diets. The study analyzed surcharges of 40% on beef and 20% on milk and suggests that an optimum plan would reduce emissions by 1 billion tonnes per year.[109][110]

Carbon sinks and removal

A carbon sink is a natural or artificial reservoir that accumulates and stores some carbon-containing chemical compound for an indefinite period, such as a growing forest. Carbon dioxide removal on the other hand is a permanent removal of carbon dioxide out of the atmosphere. Examples are direct air capture, enhanced weathering technologies such as storing it in geologic formations underground and biochar. These processes are sometimes considered variations of sinks or mitigation,[111][112] and sometimes as geoengineering.[113] In combination with other mitigation measures, carbon sinks and removal are crucial for meeting the 2 degree target.[114]

The Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) notes that one third of humankind's annual emissions of CO
are absorbed by the oceans.[115] However, this also leads to ocean acidification, which may harm marine life.[116] Acidification lowers the level of carbonate ions available for calcifying organisms to form their shells. These organisms include plankton species that contribute to the foundation of the Southern Ocean food web. However acidification may impact on a broad range of other physiological and ecological processes, such as fish respiration, larval development and changes in the solubility of both nutrients and toxins.[117]

Reforestation, avoided deforestation and afforestation

Transferring land rights to indigenous inhabitants is argued to efficiently conserve forests.

Almost 20 percent (8 GtCO2/year) of total greenhouse-gas emissions were from deforestation in 2007.[needs update] It is estimated that avoided deforestation reduces CO2 emissions at a rate of 1 tonne of CO2 per $1–5 in opportunity costs from lost agriculture. Reforestation, which is restocking of depleted forests, could save at least another 1 GtCO2/year, at an estimated cost of $5–15/tCO2.[118] According to research conducted at ETH Zurich, restoring all degraded forests all over the world could capture about 205 billion tons of carbon in total (which is about 2/3rd of all carbon emissions, bringing global warming down to below 2 °C[citation needed]).[119][120] Afforestation is where there was previously no forest. According to research by Tom Crowther et al., there is still enough room to plant an additional 1.2 trillion trees. This amount of trees would cancel out the last 10 years of CO2 emissions and sequester 160 billion tons of carbon.[121][122][123][124] This vision is being executed by the Trillion Tree Campaign. Other studies[125][126] have found large-scale afforestation can do more harm than good or such plantations are estimated to have to be prohibitively massive to reduce emissions.

Transferring rights over land from public domain to its indigenous inhabitants, who have had a stake for millennia in preserving the forests that they depend on, is argued to be a cost-effective strategy to conserve forests.[127] This includes the protection of such rights entitled in existing laws, such as India's Forest Rights Act.[127] The transferring of such rights in China, perhaps the largest land reform in modern times, has been argued to have increased forest cover.[128][129] Granting title of the land has shown to have two or three times less clearing than even state run parks, notably in the Brazilian Amazon.[130][131] Conservation methods that exclude humans and even evict inhabitants from protected areas (called "fortress conservation") often lead to more exploitation of the land as the native inhabitants then turn to work for extractive companies to survive.[128]

With increased intensive agriculture and urbanization, there is an increase in the amount of abandoned farmland. By some estimates, for every acre of original old-growth forest cut down, more than 50 acres of new secondary forests are growing, even though they do not have the same biodiversity as the original forests and original forests store 60% more carbon than these new secondary forests.[132][133] According to a study in Science, promoting regrowth on abandoned farmland could offset years of carbon emissions.[134] Research by the university ETH Zurich estimates that Russia, the United States and Canada have the most land suitable for reforestation.[135][136]

Avoided desertification

Restoring grasslands stores CO2 from the air in plant material. Grazing livestock, usually not left to wander, would eat the grass and would minimize any grass growth. However, grass left alone would eventually grow to cover its own growing buds, preventing them from photosynthesizing and the dying plant would stay in place.[137] A method proposed to restore grasslands uses fences with many small paddocks and moving herds from one paddock to another after a day or two in order to mimic natural grazers and allowing the grass to grow optimally.[137][138][139] Additionally, when part of the leaf matter is consumed by an animal in the herd, a corresponding amount of root matter is sloughed off too as it would not be able to sustain the previous amount of root matter and while most of the lost root matter would rot and enter the atmosphere, part of the carbon is sequestered into the soil.[137] It is estimated that increasing the carbon content of the soils in the world's 3.5 billion hectares of agricultural grassland by 1% would offset nearly 12 years of CO2 emissions.[137] Allan Savory, as part of holistic management, claims that while large herds are often blamed for desertification, prehistoric lands supported large or larger herds and areas where herds were removed in the United States are still desertifying.[140]

Additionally, the global warming induced thawing of the permafrost, which stores about two times the amount of the carbon currently released in the atmosphere,[141] releases the potent greenhouse gas, methane, in a positive feedback cycle that is feared to lead to a tipping point called runaway climate change. While the permafrost is about 14 degrees Fahrenheit, a blanket of snow insulates it from the colder air above which could be 40 degrees below zero Fahrenheit.[142] A method proposed to prevent such a scenario is to bring back large herbivores such as seen in Pleistocene Park, where they keep the ground cooler by reducing snow cover height by about half and eliminating shrubs and thus keeping the ground more exposed to the cold air.[143]

Protecting healthy soils and recovering damaged soils could remove 5.5 billion tons of carbon dioxide from the atmosphere annually, which is approximately equal to the annual emissions of the USA.[144]

Carbon capture and storage

Schematic showing both terrestrial and geological sequestration of carbon dioxide emissions from a large point source, for example burning natural gas

Carbon capture and storage (CCS) is a method to mitigate climate change by capturing carbon dioxide (CO2) from large point sources such as power plants and subsequently storing it away safely instead of releasing it into the atmosphere. The IPCC estimates that the costs of halting global warming would double without CCS.[145] The International Energy Agency says CCS is "the most important single new technology for CO2 savings" in power generation and industry.[146][better source needed] Norway's Sleipner gas field, beginning in 1996, stores almost a million tons of CO2 a year to avoid penalties in producing natural gas with unusually high levels of CO2.[147][146] According to a Sierra Club analysis, the US Kemper Project, which was due to be online in 2017, is the most expensive power plant ever built for the watts of electricity it will generate.[148]

Enhanced weathering

Enhanced weathering is the removal of carbon from the air into the earth, enhancing the natural carbon cycle where carbon is mineralized into rock. The CarbFix project couples with carbon capture and storage in power plants to turn carbon dioxide into stone in a relatively short period of two years. While this project used basalt rocks, olivine has also shown promise.[145]


IPCC (2007) concluded that geoengineering options, such as ocean fertilization to remove CO2 from the atmosphere, remained largely unproven.[149] It was judged that reliable cost estimates for geoengineering had not yet been published.

Chapter 28 of the National Academy of Sciences report Policy Implications of Greenhouse Warming: Mitigation, Adaptation, and the Science Base (1992) defined geoengineering as "options that would involve large-scale engineering of our environment in order to combat or counteract the effects of changes in atmospheric chemistry."[150] They evaluated a range of options to try to give preliminary answers to two questions: can these options work and could they be carried out with a reasonable cost. They also sought to encourage discussion of a third question — what adverse side effects might there be. Increasing ocean absorption of carbon dioxide (carbon sequestration) and screening out some sunlight were evaluated. NAS also argued "Engineered countermeasures need to be evaluated but should not be implemented without broad understanding of the direct effects and the potential side effects, the ethical issues, and the risks."[150] In July 2011 a report by the United States Government Accountability Office on geoengineering found that "[c]limate engineering technologies do not now offer a viable response to global climate change."[151]

Carbon dioxide removal

Carbon dioxide removal has been proposed as a method of reducing the amount of radiative forcing. A variety of means of artificially capturing and storing carbon, as well as of enhancing natural sequestration processes, are being explored. The main natural process is photosynthesis by plants and single-celled organisms (see biosequestration). Artificial processes vary, and concerns have been expressed about the long-term effects of some of these processes.[152]

It is notable that the availability of cheap energy and appropriate sites for geological storage of carbon may make carbon dioxide air capture viable commercially. It is, however, generally expected that carbon dioxide air capture may be uneconomic when compared to carbon capture and storage from major sources — in particular, fossil fuel powered power stations, refineries, etc. As in the case of the US Kemper Project with carbon capture, costs of energy produced will grow significantly. CO2 can also be used in commercial greenhouses, giving an opportunity to kick-start the technology.

Solar radiation management

The main purpose of solar radiation management is to reflect sunlight and thus reduce global warming. The ability of stratospheric sulfate aerosols to create a global dimming effect has made them a possible candidate for use in climate engineering projects.[153]

By Sector


Managed grazing methods are argued to be able to restore grasslands, thereby significantly decreasing atmospheric CO2 levels.[140]

An agriculture that mitigates climate change is generally called sustainable agriculture, defined as an agriculture that "meets society's food and textile needs in the present without compromising the ability of future generations to meet their own needs".[154]

One mode of agriculture considered as relatively sustainable is regenerative agriculture.[155] It includes several methods, the main of which are: conservation tillage, diversity, rotation and cover crops, minimizing physical disturbance, minimizing the usage of chemicals. It has other benefits like improving the state of the soil and consequently yields. Some of the big agricultural companies like General Mills and a lot of farms support it.[156]

In the United States, soils account for about half of agricultural greenhouse gas emissions while agriculture, forestry and other land use emits 24%.[157] Globally, livestock is responsible for 18 percent of greenhouse gas emissions, according to FAO's report called "Livestock's Long Shadow: Environmental Issues and Options"[158][better source needed]

The US EPA says soil management practices that can reduce the emissions of nitrous oxide (N
) from soils include fertilizer usage, irrigation, and tillage. Manure management and rice cultivation also produce gaseous emissions.

Important mitigation options for reducing the greenhouse gas emissions from livestock (especially ruminants) include genetic selection[159][160] introduction of methanotrophic bacteria into the rumen,[161][162] diet modification and grazing management.[163][164][165] Other options include just using ruminant-free alternatives instead, such as milk substitutes and meat analogues. Non-ruminant livestock (e.g. poultry) generates far fewer emissions.[166]

Methods that enhance carbon sequestration in soil include no-till farming, residue mulching, cover cropping, and crop rotation, all of which are more widely used in organic farming than in conventional farming.[167][168] Because only 5% of US farmland currently uses no-till and residue mulching, there is a large potential for carbon sequestration.[169]

A 2015 study found that farming can deplete soil carbon and render soil incapable of supporting life; however, the study also showed that conservation farming can protect carbon in soils, and repair damage over time.[170] The farming practice of cover crops has been recognized as climate-smart agriculture.[171] Best management practices for European soils were described to be increase soil organic carbon: conversion of arable land to grassland, straw incorporation, reduced tillage, straw incorporation combined with reduced tillage, ley cropping system and cover crops.[172]

In terms of prevention, vaccines are being developed in Australia to reduce the significant global warming contributions from methane released by livestock via flatulence and eructation.[173][needs update]

A project to mitigate climate change with agriculture was launched in 2019 by the "Global EverGreening Alliance". The target is to sequester carbon from the atmosphere with Agroforestry. By 2050 the restored land should sequestrate 20 billion of carbon annually[174]


Transportation emissions account for roughly 1/4 of emissions worldwide[175][better source needed] and are even more important in terms of impact in developed nations especially in North America and Australia. Many citizens of countries like the United States and Canada who drive personal cars often, see well over half of their climate change impact stemming from the emissions produced from their cars.[citation needed] Modes of mass transportation such as bus, light rail (metro, subway, etc.), and long-distance rail are far and away the most energy-efficient means of motorized transportation for passengers, able to use in many cases over twenty times less energy per person-distance than a personal automobile. Modern energy-efficient technologies, such as electric vehicles and carbon-neutral synthetic gasoline and jet fuel[citation needed] may also help to reduce the consumption of petroleum, land use changes and emissions of carbon dioxide. Utilizing rail transport, especially electric rail, over the far less efficient air transport and truck transport significantly reduces emissions.[176][177] With the use of electric trains and cars in transportation there is the opportunity to run them with low-carbon power, producing far fewer emissions.

Urban planning

Bicycles have almost no carbon footprint compared to cars, and canal transport may represent a positive option for certain types of freight in the 21st century.[178]

Effective urban planning to reduce sprawl aims to decrease Vehicle Miles Travelled (VMT), lowering emissions from transportation. Personal cars are extremely inefficient at moving passengers, while public transport and bicycles are many times more efficient (as is the simplest form of human transportation, walking). All of these are encouraged by urban/community planning and are an effective way to reduce greenhouse gas emissions. Inefficient land use development practices have increased infrastructure costs as well as the amount of energy needed for transportation, community services, and buildings.

At the same time, a growing number of citizens and government officials have begun advocating a smarter approach to land use planning. These smart growth practices include compact community development, multiple transportation choices, mixed land uses, and practices to conserve green space. These programs offer environmental, economic, and quality-of-life benefits; and they also serve to reduce energy usage and greenhouse gas emissions.

Approaches such as New Urbanism and transit-oriented development seek to reduce distances travelled, especially by private vehicles, encourage public transit and make walking and cycling more attractive options. This is achieved through "medium-density", mixed-use planning and the concentration of housing within walking distance of town centers and transport nodes.

Smarter growth land use policies have both a direct and indirect effect on energy consuming behavior. For example, transportation energy usage, the number one user of petroleum fuels, could be significantly reduced through more compact and mixed use land development patterns, which in turn could be served by a greater variety of non-automotive based transportation choices.

Building design

Emissions from housing are substantial,[179] and government-supported energy efficiency programmes can make a difference.[180]

New buildings can be constructed using passive solar building design, low-energy building, or zero-energy building techniques, using renewable heat sources. Existing buildings can be made more efficient through the use of insulation, high-efficiency appliances (particularly hot water heaters and furnaces), double- or triple-glazed gas-filled windows, external window shades, and building orientation and siting. Renewable heat sources such as shallow geothermal and passive solar energy reduce the amount of greenhouse gasses emitted. In addition to designing buildings which are more energy-efficient to heat, it is possible to design buildings that are more energy-efficient to cool by using lighter-coloured, more reflective materials in the development of urban areas (e.g. by painting roofs white) and planting trees.[181][182] This saves energy because it cools buildings and reduces the urban heat island effect thus reducing the use of air conditioning.

Societal controls

Another method being examined is to make carbon a new currency by introducing tradeable "personal carbon credits". The idea being it will encourage and motivate individuals to reduce their 'carbon footprint' by the way they live. Each citizen will receive a free annual quota of carbon that they can use to travel, buy food, and go about their business. It has been suggested that by using this concept it could actually solve two problems; pollution and poverty, old age pensioners will actually be better off because they fly less often, so they can cash in their quota at the end of the year to pay heating bills and so forth.[citation needed]


Various organizations[citation needed] promote human population planning as a means for mitigating global warming.[183] Proposed measures include improving access to family planning and reproductive health care and information, reducing natalistic politics, public education about the consequences of continued population growth, and improving access of women to education and economic opportunities.

According to a 2017 study published in Environmental Research Letters, having one less child would have a much more substantial effect on greenhouse gas emissions compared with for example living car free or eating a plant-based diet.[102] However this has been criticised: both as a category mistake for assigning descendants emissions to their ancestors[184] and for the very long timescale of reductions.[185]

Population control efforts are impeded by there being somewhat of a taboo in some countries against considering any such efforts.[186] Also, various religions discourage or prohibit some or all forms of birth control. Population size has a vastly different per capita effect on global warming in different countries, since the per capita production of anthropogenic greenhouse gases varies greatly by country.[187]

Costs and benefits

Globally the benefits of keeping warming under 2 °C exceed the costs.[188] However some consider cost–benefit analysis unsuitable for analysing climate change mitigation as a whole, but still useful for analysing the difference between a 1.5 °C target and 2 °C.[189]


One way of estimating the cost of reducing emissions is by considering the likely costs of potential technological and output changes. Policy makers can compare the marginal abatement costs of different methods to assess the cost and amount of possible abatement over time. The marginal abatement costs of the various measures will differ by country, by sector, and over time.[118] Mitigation costs will vary according to how and when emissions are cut: early, well-planned action will minimise the costs.[118]

Many economists estimate the cost of climate change mitigation at between 1% and 2% of GDP.[189] In 2019, scientists from Australia, and Germany presented the "One Earth Climate Model" showing how temperature increase can be limited to 1.5 °C for 1.7 trillion dollars a year.[190][191] According to this study, a global investment of approximately $1.7 trillion per year would be needed to keep global warming below 1.5°C. The method used by the One Earth Climate Model does not resort to dangerous geo-engineering methods. Whereas this is a large sum, it is still far less than the subsidies governments currently provided to the ailing fossil fuel industry, estimated at more than $5 trillion per year by the International Monetary Fund.[192][193]


By addressing climate change, we can avoid the costs associated with the effects of climate change. According to the Stern Review, inaction can be as high as the equivalent of losing at least 5% of global gross domestic product (GDP) each year, now and forever (up to 20% of the GDP or more when including a wider range of risks and impacts), whereas mitigating climate change will only cost about 2% of the GDP. Also, delaying to take significant reductions in greenhouse gas emissions may not be a good idea, when seen from a financial perspective.[194][195]

The research organization Project Drawdown identified global climate solutions and ranked them according to their benefits.[196] Early deaths due to fossil fuel air pollution with a temperature rise to 2 °C cost more globally than mitigation would: and in India cost 4 to 5 times more.[197]


One of the aspects of mitigation is how to share the costs and benefits of mitigation policies. In terms of the politics of mitigation, the UNFCCC's ultimate objective is to stabilize concentrations of GHG in the atmosphere at a level that would prevent "dangerous" climate change (Rogner et al., 2007).[198]

Rich people tend to emit more GHG than poor people.[199] Activities of the poor that involve emissions of GHGs are often associated with basic needs, such as cooking. For richer people, emissions tend to be associated with things such as eating beef, cars, frequent flying, and home heating.[200] The impacts of cutting emissions could therefore have different impacts on human welfare according to wealth.

Distributing emissions abatement costs

There have been different proposals on how to allocate responsibility for cutting emissions (Banuri et al., 1996, pp. 103–105):[199]

Specific proposals

Governmental and intergovernmental action

Bringing down emissions of greenhouse gases asks a good deal of people, not least that they accept the science of climate change. It requires them to make sacrifices today so that future generations will suffer less, and to weigh the needs of people who are living far away.

— The Economist, 28 November 2015[202]

In 2019 a report was published by the United Nations saying that to limit the temperature rise to 2 °C, the world will need to cut emissions by 2.7% each year from 2020 to 2030, and triple the climate targets. To limit the temperature rise to 1.5 °C the world would need to cut emissions by 7.6% each year from 2020 to 2030 and increase its climate commitments five-fold. Even if all the Paris Agreement pledges as they are in 2019, are fulfilled the temperature will rise by 3.2 degrees this century[203][204].

A report published in September 2019 before the 2019 UN Climate Action Summit says, that the full implementation of all pledges made by international coalitions, countries, cities, regions and businesses (not only those in the Paris Agreement) will be sufficient to limit temperature rise to 2 degrees but not to 1.5 degrees.[205] Additional pledges were made in the September climate summit[206] and in December.[207] All the information about all climate pledges is sent to the Global Climate Action Portal - Nazca. The scientific community is checking their fulfillment.[208]

Paris agreement and Kyoto Protocol

Refer to caption and image description
The graph shows multiple pathways to limit climate change to 1.5 °C or 2 °C. All pathways include negative emission technologies such as afforestation and bio-energy with carbon capture and storage.

The main current international agreement on combating climate change is the Paris agreement. The Paris Agreement's long-term temperature goal is to keep the increase in global average temperature to well below 2°C above pre-industrial levels; and to pursue efforts to limit the increase to 1.5°C. Each country must determine, plan, and regularly report on the contribution that it undertakes to mitigate global warming.[209] Climate change mitigation measures can be written down in national environmental policy documents like the nationally determined contributions (NDC).

The Paris agreement succeeds the 1997 Kyoto Protocol which expires in 2020, and is an amendment to the United Nations Framework Convention on Climate Change (UNFCCC). Countries that ratified the Kyoto protocol committed to reduce their emissions of carbon dioxide and five other greenhouse gases, or engage in emissions trading if they maintain or increase emissions of these gases.

How well each individual country is on track to achieving its Paris agreement commitments can be followed on-line.[210]

Additional commitments

Except the main agreements there are many additional pledges made by international coalitions, countries, cities, regions and businesses. According to a report published in september 2019 before the 2019 UN Climate Action Summit, full implementation of all pledges, including those in the Paris Agreement, will be sufficient to limit temperature rise to 2 degrees but not to 1.5 degrees.[211] After the report was published, additional pledges were made in the september climate summit[212] and in december of that year.[213]

All the information about the pledges is collected and analyzed in the Global Climate Action (portal), what is facilitating to the scientific community to check their fulfillment[214]

Temperature targets

Human activities are estimated to have caused approximately 1.0 °C of global warming above pre-industrial levels, with a likely range of 0.8 °C to 1.2 °C.[215] There is disagreement among experts over whether or not the 2 °C target can be met.[216]

Official long-term target of 1.5 °C

In 2015, two official UNFCCC scientific expert bodies came to the conclusion that, "in some regions and vulnerable ecosystems, high risks are projected even for warming above 1.5 °C".[217] This expert position was, together with the strong diplomatic voice of the poorest countries and the island nations in the Pacific, the driving force leading to the decision of the Paris Conference 2015, to lay down this 1.5 °C long-term target on top of the existing 2 °C goal.[218]

Encouraging use changes

Citizens for climate action at the People's Climate March (2017).

Emissions tax

An emissions tax on greenhouse gas emissions requires emitters to pay a fee, charge or tax for every tonne of greenhouse gas released into the atmosphere.[219] Most environmentally related taxes with implications for greenhouse gas emissions in OECD countries are levied on energy products and motor vehicles, rather than on CO2 emissions directly.[219] As such, non-transport sectors as the agricultural sector which produces large amounts of methane are typically left untaxed by current policies. Also, revenue of the emissions taxes are not always used to offset the emissions directly.[220][221]

Emission taxes can be both cost-effective and environmentally effective.[219] Difficulties with emission taxes include their potential unpopularity, and the fact that they cannot guarantee a particular level of emissions reduction.[219] Emissions or energy taxes also often fall disproportionately on lower income classes.[citation needed] In developing countries, institutions may be insufficiently developed for the collection of emissions fees from a wide variety of sources.[219]


Another indirect method of encouraging uses of renewable energy, and pursue sustainability and environmental protection, is that of prompting investment in this area through legal means, something that is already being done at national level as well as in the field of international investment.[222]

Although state policies tackling climate change are seen as a threat to investors, so is global warming itself. As well as a policy risk, Ernst and Young identify physical, secondary, liability, transitional and reputation-based risks.[223] Therefore, it is increasingly seen to be in the interest of investors to accept climate change as a real threat which they must proactively and independently address.

Carbon emissions trading

With the creation of a market for trading carbon dioxide emissions within the Kyoto Protocol, it is likely that London financial markets will be the centre for this potentially highly lucrative business; the New York and Chicago stock markets may have a lower trade volume than expected as long as the US maintains its rejection of the Kyoto.[224]

However, emissions trading may delay the phase-out of fossil fuels.[225]

In the north-east United States, a successful cap and trade program has shown potential for this solution.[226]

The European Union Emission Trading Scheme (EU ETS)[227] is the largest multi-national, greenhouse gas emissions trading scheme in the world. It commenced operation on 1 January 2005, and all 28 member states of the European Union participate in the scheme which has created a new market in carbon dioxide allowances estimated at 35 billion Euros (US$43 billion) per year.[228] The Chicago Climate Exchange was the first (voluntary) emissions market, and is soon to be followed by Asia's first market (Asia Carbon Exchange). A total of 107 million metric tonnes of carbon dioxide equivalent have been exchanged through projects in 2004, a 38% increase relative to 2003 (78 Mt CO2e).[229]

Twenty three multinational corporations have come together in the G8 Climate Change Roundtable, a business group formed at the January 2005 World Economic Forum. The group includes Ford, Toyota, British Airways, and BP. On 9 June 2005 the Group published a statement[230] stating that there was a need to act on climate change and claiming that market-based solutions can help. It called on governments to establish "clear, transparent, and consistent price signals" through "creation of a long-term policy framework" that would include all major producers of greenhouse gases.

The Regional Greenhouse Gas Initiative is a proposed carbon trading scheme being created by nine North-eastern and Mid-Atlantic American states; Connecticut, Delaware, Maine, Massachusetts, New Hampshire, New Jersey, New York, Rhode Island, and Vermont. The scheme was due to be developed by April 2005 but has not yet been completed.


Since 2000, rising CO
emissions in China and the rest of world have eclipsed the output of the United States and Europe.[231]
Per person, the United States generates carbon dioxide at a far faster rate than other primary regions.[231]

Implementation puts into effect climate change mitigation strategies and targets. These can be targets set by international bodies or voluntary action by individuals or institutions. This is the most important, expensive and least appealing aspect of environmental governance.[232]


Funding, such as the Green Climate Fund, is often provided by nations, groups of nations and increasingly NGO and private sources. These funds are often channelled through the Global Environmental Facility (GEF). This is an environmental funding mechanism in the World Bank which is designed to deal with global environmental issues.[232] The GEF was originally designed to tackle four main areas: biological diversity, climate change, international waters and ozone layer depletion, to which land degradation and persistent organic pollutant were added. The GEF funds projects that are agreed to achieve global environmental benefits that are endorsed by governments and screened by one of the GEF's implementing agencies.[233]


It has been estimated that only 0.12% of all funding for climate-related research is spent on the social science of climate change mitigation.[234] Vastly more funding is spent on natural science studies of climate change and considerable sums are also spent on studies of impact of and adaptation to climate change.[234] It has been argued that this is a misallocation of resources, as the most urgent puzzle at the current juncture is to work out how to change human behavior to mitigate climate change, whereas the natural science of climate change is already well established and there will be decades and centuries to handle adaptation.[234]


There are numerous issues which result in a current perceived lack of implementation.[232] It has been suggested that the main barriers to implementation are Uncertainty, Fragmentation, Institutional void, Short time horizon of policies and politicians and Missing motives and willingness to start adapting. The relationships between many climatic processes can cause large levels of uncertainty as they are not fully understood and can be a barrier to implementation. When information on climate change is held between the large numbers of actors involved it can be highly dispersed, context specific or difficult to access causing fragmentation to be a barrier. Institutional void is the lack of commonly accepted rules and norms for policy processes to take place, calling into question the legitimacy and efficacy of policy processes. The Short time horizon of policies and politicians often means that climate change policies are not implemented in favour of socially favoured societal issues. Statements are often posed to keep the illusion of political action to prevent or postpone decisions being made. Missing motives and willingness to start adapting is a large barrier as it prevents any implementation.[235] The issues that arise with a system which involves international government cooperation, such as cap and trade, could potentially be improved with a polycentric approach where the rules are enforced by many small sections of authority as opposed to one overall enforcement agency.[236] Concerns about metal requirement and/or availability for essential decarbonization technologies such as photovoltaics, nuclear power, and (plug-in hybrid) electric vehicles have also been expressed as obstacles.[237]


Despite a perceived lack of occurrence,[clarification needed] evidence of implementation is emerging internationally. Some examples of this are the initiation of NAPA's and of joint implementation. Many developing nations have made National Adaptation Programs of Action (NAPAs) which are frameworks to prioritize adaption needs.[238] The implementation of many of these is supported by GEF agencies.[239] Many developed countries are implementing 'first generation'[clarification needed] institutional adaption plans particularly at the state and local government scale.[238] There has also been a push towards joint implementation between countries by the UNFCCC as this has been suggested as a cost-effective way for objectives to be achieved.[240]

Montreal protocol

Although not designed for this purpose, the Montreal Protocol has benefited climate change mitigation efforts.[241] The Montreal Protocol is an international treaty that has successfully reduced emissions of ozone-depleting substances (for example, CFCs), which are also greenhouse gases.

Territorial policies

Many countries are aiming for net zero emissions, and many have either carbon taxes or carbon emission trading.

Carbon taxes and emission trading worldwide
Emission trading and carbon taxes around the world (2019)[242]
  Carbon emission trading implemented or scheduled
  Carbon tax implemented or scheduled
  Carbon emission trading or carbon tax under consideration

United States

Efforts to reduce greenhouse gas emissions by the United States include energy policies which encourage efficiency through programs like Energy Star, Commercial Building Integration, and the Industrial Technologies Program.[243]

In the absence of substantial federal action, state governments have adopted emissions-control laws such as the Regional Greenhouse Gas Initiative in the Northeast and the Global Warming Solutions Act of 2006 in California.[244] In 2019 a new climate change bill was introduced in Minnesota. One of the targets, is making all the energy of the state carbon free, by 2030.[245]


As to 2019, China implements more than 100 policies to fight climate change. China said in the Paris Agreement that its emission will begin to fall by 2030, but it will possibly occur by 2026. This can position China as a leader on the issue because it is the biggest emitter of GHG emissions, so if it really reduces them, the significance will be large.[246]

European Union

The climate commitments of the European Union are divided into 3 main categories: targets for the year 2020, 2030 and 2050. The European Union claim that their policies are in line with the goal of the Paris Agreement.[247][248]

Targets for the year 2020[249]:

Targets for the year 2030[250]:

Targets for the year 2050[252]:


The European Union claims that he has already achieved the 2020 target for emission reduction and have the legislation needed to achieve the 2030 targets. Already in 2018, its GHG emissions were 23% lower that in 1990.[253]

New Zealand

New Zealand made significant pledges on climate change mitigation in the year 2019: reduce emissions to zero by 2050, plant 1 billion trees by 2028, and made high taxes on farmers who will not reduce emissions in 2025. Already in 2019 New Zealand banned new offshore oil and gas drilling and decided the climate change issues will be examined before every important decision.[254]

Developing countries

In order to reconcile economic development with mitigating carbon emissions, developing countries need particular support, both financial and technical. One of the means of achieving this is the Kyoto Protocol's Clean Development Mechanism (CDM). The World Bank's Prototype Carbon Fund[255] is a public private partnership that operates within the CDM.

An important point of contention, however, is how overseas development assistance not directly related to climate change mitigation is affected by funds provided to climate change mitigation.[256] One of the outcomes of the UNFCC Copenhagen Climate Conference was the Copenhagen Accord, in which developed countries promised to provide US$30 million between 2010 and 2012 of new and additional resources.[256] Yet it remains unclear what exactly the definition of additional is and the European Commission has requested its member states to define what they understand to be additional, and researchers at the Overseas Development Institute have found four main understandings:[256]

  1. Climate finance classified as aid, but additional to (over and above) the '0.7%' ODA target;
  2. Increase on previous year's Official Development Assistance (ODA) spent on climate change mitigation;
  3. Rising ODA levels that include climate change finance but where it is limited to a specified percentage; and
  4. Increase in climate finance not connected to ODA.

The main point being that there is a conflict between the OECD states budget deficit cuts, the need to help developing countries adapt to develop sustainably and the need to ensure that funding does not come from cutting aid to other important Millennium Development Goals.[256]

However, none of these initiatives suggest a quantitative cap on the emissions from developing countries. This is considered as a particularly difficult policy proposal as the economic growth of developing countries are proportionally reflected in the growth of greenhouse emissions. Critics[who?] of mitigation often argue that, the developing countries' drive to attain a comparable living standard to the developed countries would doom the attempt at mitigation of global warming. Critics[who?] also argue that holding down emissions would shift the human cost of global warming from a general one to one that was borne most heavily by the poorest populations on the planet.

In an attempt to provide more opportunities for developing countries to adapt clean technologies, UNEP and WTO urged the international community to reduce trade barriers and to conclude the Doha trade round "which includes opening trade in environmental goods and services".[257]

In 2019 week of climate action in Latin America and the Caribbean result in a declaration in which leaders says that they will act to reduce emissions in the sectors of transportation, energy, urbanism, industry, forest conservation and land use and "sent a message of solidarity with all the people of Brazil suffering the consequences of the rainforest fires in the Amazon region, underscoring that protecting the world's forests is a collective responsibility, that forests are vital for life and that they are a critical part of the solution to climate change".[258][259]

Non-governmental approaches

While many of the proposed methods of mitigating global warming require governmental funding, legislation and regulatory action, individuals and businesses can also play a part in the mitigation effort.

Choices in personal actions and business operations

Environmental groups encourage individual action against global warming, often aimed at the consumer. Common recommendations include lowering home heating and cooling usage, burning less gasoline, supporting renewable energy sources, buying local products to reduce transportation, turning off unused devices, and various others.

A geophysicist at Utrecht University has urged similar institutions to hold the vanguard in voluntary mitigation, suggesting the use of communications technologies such as videoconferencing to reduce their dependence on long-haul flights.[260]

Air travel and shipment

In 2008, climate scientist Kevin Anderson raised concern about the growing effect of rapidly increasing global air transport on the climate in a paper,[261] and a presentation,[262] suggesting that reversing this trend is necessary to reduce emissions.

Part of the difficulty is that when aviation emissions are made at high altitude, the climate impacts are much greater than otherwise. Others have been raising the related concerns of the increasing hypermobility of individuals, whether traveling for business or pleasure, involving frequent and often long distance air travel, as well as air shipment of goods.[263]

Business opportunities and risks

Investor response

Climate change is also a concern for large institutional investors who have a long term time horizon and potentially large exposure to the negative impacts of global warming because of the large geographic footprint of their multi-national holdings. Socially responsible investing funds allow investors to invest in funds that meet high ESG (environmental, social, governance) standards as such funds invest in companies that are aligned with these goals.[264] Proxy firms can be used to draft guidelines for investment managers that take these concerns into account.[265]

Legal action

In some countries, those affected by climate change may be able to sue major producers. Attempts at litigation have been initiated by entire peoples such as Palau[266] and the Inuit,[267] as well as non-governmental organizations such as the Sierra Club.[268] Although proving that particular weather events are due specifically to global warming may never be possible,[269] methodologies have been developed to show the increased risk of such events caused by global warming.[270]

For a legal action for negligence (or similar) to succeed, "Plaintiffs ... must show that, more probably than not, their individual injuries were caused by the risk factor in question, as opposed to any other cause. This has sometimes been translated to a requirement of a relative risk of at least two."[271] Another route (though with little legal bite) is the World Heritage Convention, if it can be shown that climate change is affecting World Heritage Sites like Mount Everest.[272][273]

Besides countries suing one another, there are also cases where people in a country have taken legal steps against their own government. Legal action for instance has been taken to try to force the US Environmental Protection Agency to regulate greenhouse gas emissions under the Clean Air Act,[274] and against the Export-Import Bank and OPIC for failing to assess environmental impacts (including global warming impacts) under NEPA.[citation needed]

In the Netherlands and Belgium, organisations such as the foundation Urgenda[275][276][277] and the vzw Klimaatzaak in Belgium[278][279] have also sued their governments as they believe their governments aren't meeting the emission reductions they agreed to. Urgenda have already won their case against the Dutch government.[citation needed]

According to a 2004 study commissioned by Friends of the Earth, ExxonMobil, and its predecessors caused 4.7 to 5.3 percent of the world's man-made carbon dioxide emissions between 1882 and 2002. The group suggested that such studies could form the basis for eventual legal action.[280]

In 2015, Exxon received a subpoena. According to the Washington Post and confirmed by the company, the attorney general of New York, Eric Schneiderman, opened an investigation into the possibility that the company had misled the public and investors about the risks of climate change.[281] In October 2019, the trial began.[282] Massachusetts sued Exxon also, for hiding the impact of climate change.[283]

In 2019, 22 states, six cities and Washington DC in United States, sued the Trump administration for repealing the Clean Power Plan.[284]


Many people standing on steps of large public building holding banners with signs, including "Act For Climate" and "Go Nuclear."
Protesters at the Helsinki People's Climate March[disambiguation needed], 29 November 2015

Environmental organizations organize different actions such as Peoples Climate Marches and Divestment from fossil fuels. 1,000 organizations with a worth of 8 trillion dollars, made commitments to divest from fossil fuel to 2018.[285] Another form of action is climate strike.[286] In January 2019 12,500 students marched in Brussels demanding Climate action.[287] In 2019 The organization Extinction Rebellion organized massive protests demanding "tell the truth about climate change, reduce carbon emissions to zero by 2025, and create a citizens' assembly to oversee progress", including blocking roads. Many were arrested.[288] In many cases, activism brings positive results.[289]

A major event was the global climate strike in September 2019 organized by Fridays For Future and Earth Strike.[290] The target was to influence the climate action summit organized by the UN on September 23.[291] According to the organizers four million people participated in the strike on September 20.[292]

See also

By country



  1. ^ Friedlingstein et al. 2019.
  2. ^ Fisher, B.S.; et al., "Ch. 3: Issues related to mitigation in the long-term context", Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, 2007, 3.5 Interaction between mitigation and adaptation, in the light of climate change impacts and decision-making under long-term uncertainty, in IPCC AR4 WG3 2007
  3. ^ a b c IPCC, "Summary for policymakers", Climate Change 2007: Working Group III: Mitigation of Climate Change, Table SPM.3, C. Mitigation in the short and medium term (until 2030), in IPCC AR4 WG3 2007
  4. ^ "GHG Emissions". CAIT Climate Data Explorer. Retrieved 29 January 2020.
  5. ^ "Falling Renewable Power Costs Open Door to Greater Climate Ambition". IRENA. Retrieved 29 January 2020.
  6. ^ For examples, see E McGaughey, M Lawrence and Common Wealth, 'The Green Recovery Act 2020', a proposed United Kingdom law, and pdf, Bernie Sanders, Green New Deal (2019) proposal in the United States, and a Green New Deal for Europe (2019) Edition II, foreword by Ann Pettifor and Bill McKibben
  7. ^ "Sec 5.5 Technology flows and development", Climate Change 2007: Synthesis Report, in IPCC AR4 SYR 2007, p. 68
  8. ^ "Climate engineering: International meeting reveals tensions: Lack of transparency impedes collaboration, excludes developing world". ScienceDaily. Retrieved 2020-04-02.
  9. ^ UNFCCC (5 March 2013), Introduction to the Convention, UNFCCC
  10. ^ UNFCCC (2002), Full Text of the Convention, Article 2: Objectives, UNFCCC
  11. ^ UNFCCC. Conference of the Parties (COP) (15 March 2011), Report of the Conference of the Parties on its sixteenth session, held in Cancun from 29 November to 10 December 2010. Addendum. Part two: Action taken by the Conference of the Parties at its sixteenth session (PDF), Geneva, Switzerland: United Nations, p. 3, paragraph 4. Document available in UN languages and text format.
  12. ^ IPCC SR15 Technical Summary 2018, p. 31
  13. ^ IPCC SR15 Summary for Policymakers 2018, p. 15
  14. ^ Harvey, Fiona (26 November 2019). "UN calls for push to cut greenhouse gas levels to avoid climate chaos". The Guardian. Retrieved 27 November 2019.
  15. ^ "Cut Global Emissions by 7.6 Percent Every Year for Next Decade to Meet 1.5°C Paris Target - UN Report". United Nations Framework Convention on Climate Change. United Nations. Retrieved 27 November 2019.
  16. ^ Victor, D., et al., Executive summary, in: Chapter 1: Introductory Chapter, p. 4 (archived 3 July 2014), in IPCC AR5 WG3 2014
  17. ^ Sampedro et al. 2020.
  18. ^ a b c d Meehl, G.A.; et al., "Ch. 10: Global Climate Projections", Climate Change 2007: Working Group I: The Physical Science Basis, FAQ 10.3: If Emissions of Greenhouse Gases are Reduced, How Quickly do Their Concentrations in the Atmosphere Decrease?, in IPCC AR4 WG1 2007, pp. 824–825
  19. ^ Rogner, H.-H.; et al. (2007). "1.2 Ultimate objective of the UNFCCC". In B. Metz; et al. (eds.). Introduction. Climate Change 2007: Mitigation. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Print version: Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA. This version: IPCC website. Archived from the original on 2014-09-23. Retrieved 2011-06-07.
  20. ^ 2. Stabilization and Climate Change of the Next Few Decades and Next Several Centuries, p. 21, in: Summary, in US NRC 2011
  21. ^ IPCC SR15 Ch2 2018, p. 96
  22. ^ IPCC SR15 Ch1 2018, p. 66
  23. ^ IPCC SR15 Summary for Policymakers 2018, p. 5
  24. ^ Anderson, Kevin; Bows, Alice (13 January 2011). "Beyond 'dangerous' climate change: emission scenarios for a new world". Philosophical Transactions of the Royal Society A. 369 (1934): 20–44. Bibcode:2011RSPTA.369...20A. doi:10.1098/rsta.2010.0290. PMID 21115511.
  25. ^ Anderson, Kevin; Bows, Alice (2012). "A new paradigm for climate change". Nature Climate Change. 2 (9): 639–40. Bibcode:2012NatCC...2..639A. doi:10.1038/nclimate1646. S2CID 84963926.
  26. ^ Anderson K. (2012). Real clothes for the Emperor: Facing the challenges of climate change. The Cabot annual lecture, Univ. of Bristol. Video, Transcript
  27. ^ The Radical Emission Reduction Conference: 10–11 December 2013 Archived 27 October 2014 at the Wayback Machine, sponsored by the Tyndall Centre. Video proceedings Archived 2017-03-24 at the Wayback Machine on-line.
  28. ^ a b c Global Carbon Budget 2019
  29. ^ Grubb, M. (July–September 2003). "The Economics of the Kyoto Protocol" (PDF). World Economics. 4 (3): 146–47. Archived from the original (PDF) on 2011-07-17. Retrieved 2010-03-25.
  30. ^ "Methane vs. Carbon Dioxide: A Greenhouse Gas Showdown". One Green Planet. 30 September 2014. Retrieved 2015-11-15.
  31. ^ Lombrana, Laura Millan; Warren, Hayley; Rathi, Akshat (2020). "Measuring the Carbon-Dioxide Cost of Last Year's Worldwide Wildfires". Bloomberg L.P.
  32. ^ Global fire annual emissions (PDF) (Report). Global Fire Emissions Database.
  33. ^ a b c d Olivier & Peters 2020, p. 12
  34. ^ Olivier & Peters 2020, p. 23
  35. ^ Olivier & Peters 2020, p. 38
  36. ^ Fisher, B.S.; et al., "Ch 3: Issues related to mitigation in the long-term context", Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, 2007, Sec 3.1 Emissions scenarios, in IPCC AR4 WG3 2007
  37. ^ Rogner, H.-H.; et al., "Ch 1: Introduction", Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, 2007, Sec Total GHG emissions, in IPCC AR4 WG3 2007, p. 111
  38. ^ Steffen, Will; Rockström, Johan; Richardson, Katherine; M. Lenton, Timothy; Folke, Carl; Liverman, Diana; P. Summerhayes, Colin; D. Barnosky, Anthony; E. Cornell, Sarah; Crucifix, Michel; F. Donges, Jonathan; Fetzer, Ingo; J. Lade, Steven; Scheffer, Marten; Winkelmann, Ricarda; Hans Joachim Schellnhuber, Hans (August 6, 2018). "Trajectories of the Earth System in the Anthropocene". Proceedings of the National Academy of Sciences. 115 (33): 8252–8259. Bibcode:2018PNAS..115.8252S. doi:10.1073/pnas.1810141115. PMC 6099852. PMID 30082409.
  39. ^ 'We cannot be radical enough': Attenborough on climate crisis action. 2019-07-09. ISSN 0261-3077. Retrieved 2019-09-02.
  40. ^ Issues in Science Archived 2013-09-27 at the Wayback Machine & Technology Online; "Promoting Low-Carbon Electricity Production"
  41. ^ "Social, Economic, and Ethical Concepts and Methods, Executive Summary" (PDF), Climate Change 2014: Mitigation of Climate Change, in IPCC AR5 WG3 2014, p. 211
  42. ^ "How Reforming Fossil Fuel Subsidies Can Go Wrong: A lesson from Ecuador". IISD. Retrieved 2019-11-11.
  43. ^ "Sec 4.3 Mitigation options", Climate Change 2007: Synthesis Report, in IPCC AR4 SYR 2007
  44. ^ Sathaye, J.; et al., "Ch 12: Sustainable Development and mitigation", Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, 2007, Sec Development paths as well as climate policies determine GHG emissions, in IPCC AR4 WG3 2007, pp. 701–703
  45. ^ Times, The New York (2019-10-07). "Climate and Energy Experts Debate How to Respond to a Warming World". The New York Times. ISSN 0362-4331. Retrieved 2019-11-10.
  46. ^ Paul Gipe (4 April 2013). "100 Percent Renewable Vision Building". Renewable Energy World.
  47. ^ IPCC (2011). "Special Report on Renewable Energy Sources and Climate Change Mitigation" (PDF). Cambridge University Press, Cambridge, United Kingdom and New York, NY. p. 17. Archived from the original (PDF) on 2014-01-11.
  48. ^ a b Global Energy & CO2 Status Report 2019
  49. ^ "Costs (of renewable energy)". Retrieved 27 March 2020.
  50. ^ "Global Energy Transformation: A Roadmap to 2050 (2019 edition)" (PDF). IRENA. Retrieved 29 January 2020.
  51. ^ Edwin Cartlidge (18 November 2011). "Saving for a rainy day". Science. 334 (6058): 922–24. Bibcode:2011Sci...334..922C. doi:10.1126/science.334.6058.922. PMID 22096185.
  52. ^ "KAHRAMAA and Siraj Energy Sign Agreements for Al-Kharsaah Solar PV Power Plant" (Press release). Qatar General Electricity & Water Corporation “KAHRAMAA”. Retrieved 26 January 2020.
  53. ^ "Solar Thermal could fall to 45 Euros in 2020". HeliosCSP. Retrieved 24 March 2020.
  54. ^ "Global Wind Atlas". DTU Technical University of Denmark. Retrieved 28 March 2020.
  55. ^ "Golbal Wind Report 2019". Global Wind Energy Council. 19 March 2020. Retrieved 28 March 2020.
  56. ^ "BP Statistical Review 2019" (PDF). Retrieved 28 March 2020.
  57. ^ "Large hydropower dams not sustainable in the developing world". BBC. Retrieved 27 March 2020.
  58. ^ "From baseload to peak" (PDF). IRENA. Retrieved 27 March 2020.
  59. ^ "Biomass - Carbon sink or carbon sinner" (PDF). UK environment agency. Retrieved 27 March 2020.
  60. ^ IPCC SR15 Ch2 2018, p. 131
  61. ^ "Ramp up nuclear power to beat climate change, says UN nuclear chief". UN. Retrieved 1 February 2020.
  62. ^ "Nuclear Reprocessing: Dangerous, Dirty, and Expensive". Union of Concerned Scientists. Retrieved 26 January 2020.
  63. ^ "Is nuclear power the answer to climate change?". World Information Service on Energy. Retrieved 1 February 2020.
  64. ^ Gallup International 2011, pp. 9–10
  65. ^ Ipsos 2011, p. 4
  66. ^ "May: Steep decline in nuclear power would threaten energy security and climate goals". Retrieved 2019-07-08.
  67. ^ It's Official: The United Kingdom is to subsidize nuclear power, but at what cost? (Report). International Institute for Sustainable Development. Retrieved 29 March 2020.
  68. ^ "Beyond ITER". The ITER Project. Information Services, Princeton Plasma Physics Laboratory. Archived from the original on 7 November 2006. Retrieved 5 February 2011. – Projected fusion power timeline
  69. ^ Dodge, Edward (December 6, 2014). "Power-to-Gas Enables Massive Energy Storage". Retrieved 25 May 2015.
  70. ^ Scott, Mark (October 7, 2014). "Energy for a Rainy Day, or a Windless One". New York Times. Retrieved 26 May 2015.
  71. ^ Randall, Tom (January 30, 2015). "Seven Reasons Cheap Oil Can't Stop Renewables Now". BloombergBusiness. Bloomberg L.P. Retrieved 26 May 2015.
  72. ^ Moomaw, W., P. Burgherr, G. Heath, M. Lenzen, J. Nyboer, A. Verbruggen, 2011: Annex II: Methodology. In IPCC: Special Report on Renewable Energy Sources and Climate Change Mitigation (ref. page 10)
  73. ^ Bertsch, Joachim; Growitsch, Christian; Lorenczik, Stefan; Nagl, Stephan (2012). "Flexibility options in European electricity markets in high RES-E scenarios" (PDF). University of Cologne. Retrieved 29 March 2020.
  74. ^ "The uncertain role of natural gas in the transition to clean energy" (Press release). MIT News Office. 2019.
  75. ^ Schmidt et al. 2019
  76. ^ "Volkswagen plans to tap electric car batteries to compete with power firms". Reuters. 2020-03-12. Retrieved 2020-04-07.
  77. ^ a b Pellow et al. 2015
  78. ^ "The spiralling environmental cost of our lithium battery addiction". WIRED. Retrieved 26 January 2020.
  79. ^ "Is Green Hydrogen The Future Of Energy Storage?". Retrieved 2020-04-07.
  80. ^ Welder et al. 2019
  81. ^ Beauvais, Aurélie (13 November 2019). "Solar + Hydrogen: The perfect match for a Paris-compatible hydrogen strategy?". Solar Power Europe.
  82. ^ "Ammonia flagged as green shipping fuel of the future". Financial Times. 30 March 2020.
  83. ^ "UHV Grid". Global Energy Interconnection (GEIDCO). Retrieved 26 January 2020.
  84. ^ "GEIDCO development strategy". Global Energy Interconnection (GEIDCO). Retrieved 26 January 2020.
  85. ^ "North American Supergrid" (PDF). Climate Institute (USA). Retrieved 26 January 2020.
  86. ^ "Renewable Energy and Load Management" (PDF). UTS University of Technology Sydney. Retrieved 28 March 2020.
  87. ^ "The electrification of transport: episode one". BHP. Retrieved 2020-04-07.
  88. ^ "Want Electric Ships? Build a Better Battery". Wired. ISSN 1059-1028. Retrieved 2020-04-07.
  89. ^ "The scale of investment needed to decarbonize international shipping". Retrieved 2020-04-07.
  90. ^ "Filling up with H2". H2 mobility. Retrieved 5 April 2020.
  91. ^ Volkswagen AG: Hydrogen or battery 2019
  92. ^ "The aviation network - Decarbonisation issues". Retrieved 2020-04-07.
  93. ^ IPCC SR15 Ch2 2018, p. 141
  94. ^ IEA ETP Buildings 2017
  95. ^ Staffell Iain; et al. (2012). "A review of domestic heat pumps". Energy and Environmental Science. 5 (11): 9291–9306. doi:10.1039/c2ee22653g.
  96. ^ Carvalho; et al. (2015). "Ground source heat pump carbon emissions and primary energy reduction potential for heating in buildings in Europe—results of a case study in Portugal". Renewable and Sustainable Energy Reviews. 45: 755–768. doi:10.1016/j.rser.2015.02.034.
  97. ^ Sternberg André, Bardow André (2015). "Power-to-What? – Environmental assessment of energy storage systems". Energy and Environmental Science. 8 (2): 389–400. doi:10.1039/c4ee03051f.
  98. ^ Sophie Hebden (2006-06-22). "Invest in clean technology says IEA report". Retrieved 2010-07-16.
  99. ^ Edenhofer, Ottmar; Pichs-Madruga, Ramón; et al. (2014). "Summary for Policymakers" (PDF). In IPCC (ed.). Climate change 2014: mitigation of climate change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK and New York, NY, USA: Cambridge University Press. ISBN 978-1-107-65481-5. Retrieved 2016-06-21.
  100. ^ Chancel, Lucas; Piketty, Thomas (2015-12-01). "Carbon and inequality: From Kyoto to Paris". Retrieved 2020-09-14.
  101. ^ a b c Wynes, Seth; Nicholas, Kimberly A (12 July 2017). "The climate mitigation gap: education and government recommendations miss the most effective individual actions". Environmental Research Letters. 12 (7): 074024. Bibcode:2017ERL....12g4024W. doi:10.1088/1748-9326/aa7541.
  102. ^ Ceballos, Gerardo; Ehrlich, Paul P; Dirzo, Rodolfo (23 May 2017). "Biological annihilation via the ongoing sixth mass extinction signaled by vertebrate population losses and declines". Proceedings of the National Academy of Sciences of the United States of America. 114 (30): E6089–E6096. doi:10.1073/pnas.1704949114. PMC 5544311. PMID 28696295. Much less frequently mentioned are, however, the ultimate drivers of those immediate causes of biotic destruction, namely, human overpopulation and continued population growth, and overconsumption, especially by the rich. These drivers, all of which trace to the fiction that perpetual growth can occur on a finite planet, are themselves increasing rapidly.
  103. ^ Pimm, S. L.; Jenkins, C. N.; Abell, R.; Brooks, T. M.; Gittleman, J. L.; Joppa, L. N.; Raven, P. H.; Roberts, C. M.; Sexton, J. O. (30 May 2014). "The biodiversity of species and their rates of extinction, distribution, and protection" (PDF). Science. 344 (6187): 1246752. doi:10.1126/science.1246752. PMID 24876501. S2CID 206552746. Retrieved 15 December 2016. The overarching driver of species extinction is human population growth and increasing per capita consumption.
  104. ^ Corner, Adam (13 December 2013). "'Every little helps' is a dangerous mantra for climate change". The Guardian. Retrieved 31 March 2020.
  105. ^ Fleurbaey, Marc; Kartha, Sivan; et al. (2014). "Chapter 4: Sustainable Development and Equity" (PDF). In IPCC (ed.). Climate change 2014: mitigation of climate change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK and New York, NY, USA: Cambridge University Press. ISBN 978-1-107-65481-5. Retrieved 2016-06-21.
  106. ^ Harvey, Fiona (21 March 2016). "Eat less meat to avoid dangerous global warming, scientists say". The Guardian. Retrieved 2016-06-20.
  107. ^ Milman, Oliver (20 June 2016). "China's plan to cut meat consumption by 50% cheered by climate campaigners". The Guardian. Retrieved 2016-06-20.
  108. ^ Carrington, Damian (7 November 2016). "Tax meat and dairy to cut emissions and save lives, study urges". The Guardian. London, United Kingdom. ISSN 0261-3077. Retrieved 2016-11-07.
  109. ^ Springmann, Marco; Mason-D'Croz, Daniel; Robinson, Sherman; Wiebe, Keith; Godfray, H Charles J; Rayner, Mike; Scarborough, Peter (7 November 2016). "Mitigation potential and global health impacts from emissions pricing of food commodities". Nature Climate Change. 7 (1): 69. Bibcode:2017NatCC...7...69S. doi:10.1038/nclimate3155. ISSN 1758-678X. S2CID 88921469.
  110. ^ "OECD Environmental Outlook to 2050, Climate Change Chapter, pre-release version" (PDF). OECD. 2011. Retrieved 2012-04-23.
  111. ^ "IEA Technology Roadmap Carbon Capture and Storage 2009" (PDF). OECD/IEA. 2009. Archived from the original (PDF) on 2010-12-04. Retrieved 2012-04-23.
  112. ^ "Geoengineering the climate: science, governance and uncertainty". The Royal Society. 2009. Retrieved 2012-04-23.
  113. ^ "This is what you need to know about CCS – Carbon Capture and Storage". SINTEF. Retrieved 2020-04-02.
  114. ^ "Archived copy". Archived from the original on August 11, 2013. Retrieved July 21, 2013.CS1 maint: archived copy as title (link)
  115. ^ "Archived copy". Archived from the original on May 14, 2013. Retrieved July 21, 2013.CS1 maint: archived copy as title (link)
  116. ^ "Archived copy". Archived from the original on August 11, 2013. Retrieved July 21, 2013.CS1 maint: archived copy as title (link)
  117. ^ a b c Stern, N. (2006). Stern Review on the Economics of Climate Change: Part III: The Economics of Stabilisation. HM Treasury, London:
  118. ^ Tutton, Mark. "Restoring forests could capture two-thirds of the carbon humans have added to the atmosphere". CNN. Retrieved 2020-02-13.
  119. ^ Chazdon, Robin; Brancalion, Pedro (2019-07-05). "Restoring forests as a means to many ends". Science. 365 (6448): 24–25. Bibcode:2019Sci...365...24C. doi:10.1126/science.aax9539. ISSN 0036-8075. PMID 31273109. S2CID 195804244.
  120. ^ Ehrenberg, Rachel. "Global count reaches 3 trillion trees". Nature News. doi:10.1038/nature.2015.18287. S2CID 189415504.
  121. ^ Tutton, Mark. "The most effective way to tackle climate change? Plant 1 trillion trees". CNN. Retrieved 2020-02-13.
  122. ^ Wang, Brian. "We Have Room to Add 35% More Trees Globally to Store 580-830 Billion Tons of CO2 –". Retrieved 2020-02-13.
  123. ^ "Home". Crowtherlab. Retrieved 2020-02-13.
  124. ^ McGrath, Matt (2020-06-22). "Planting new forests 'can do more harm than good'". BBC News. Retrieved 2020-06-23.
  125. ^ Lena R. Boysen, Wolfgang Lucht, Dieter Gerten, Vera Heck, Timothy M. Lenton, Hans Joachim Schellnhuber. The limits to global-warming mitigation by terrestrial carbon removal. Earth's Future, 2017; DOI: 10.1002/2016EF000469
  126. ^ a b "India should follow China to find a way out of the woods on saving forest people". The Guardian. 22 July 2016. Retrieved 2 November 2016.
  127. ^ a b "How Conservation Became Colonialism". Foreign Policy. 16 July 2018. Retrieved 30 July 2018.
  128. ^ "China's forest tenure reforms". Archived from the original on 23 September 2016. Retrieved 7 August 2016.
  129. ^ Ding, Helen; Veit, Peter; Gray, Erin; Reytar, Katie; Altamirano, Juan-Carlos; Blackman, Allen; Hodgdon, Benjamin (October 2016). "Climate benefits, tenure costs: The economic case for securing indigenous land rights in the Amazon". World Resources Institute (WRI). Washington DC, USA. Retrieved 2016-11-02.
  130. ^ Ding, Helen; Veit, Peter G; Blackman, Allen; Gray, Erin; Reytar, Katie; Altamirano, Juan-Carlos; Hodgdon, Benjamin (2016). Climate benefits, tenure costs: The economic case for securing indigenous land rights in the Amazon (PDF). Washington DC, USA: World Resources Institute (WRI). ISBN 978-1-56973-894-8. Retrieved 2016-11-02.
  131. ^ "New Jungles Prompt a Debate on Rain Forests". New York Times. 29 January 2009. Retrieved 18 July 2016.
  132. ^ Young, E. (2008). IPCC Wrong On Logging Threat to Climate. New Scientist, August 5, 2008. Retrieved on August 18, 2008, from
  133. ^ "In Latin America, Forests May Rise to Challenge of Carbon Dioxide". New York Times. 16 May 2016. Retrieved 18 July 2016.
  134. ^ Sengupta, Somini (2019-07-05). "Restoring Forests Could Help Put a Brake on Global Warming, Study Finds". The New York Times. ISSN 0362-4331. Retrieved 2019-07-07.
  135. ^ RESTORATION ECOLOGY:The global tree restoration potential, 5 July 2019. Retrieved 9 August 2019.
  136. ^ a b c d "How fences could save the planet". January 13, 2011. Retrieved May 5, 2013.
  137. ^ "Restoring soil carbon can reverse global warming, desertification and biodiversity". February 21, 2008. Archived from the original on June 25, 2013. Retrieved May 5, 2013.
  138. ^ "How eating grass-fed beef could help fight climate change". January 25, 2010. Retrieved May 11, 2013.
  139. ^ a b "How cows could repair the world". March 6, 2013. Retrieved May 5, 2013.
  140. ^ P. Falkowski; et al. (13 October 2000). "The Global Carbon Cycle: A Test of Our Knowledge of Earth as a System". Science. 290 (5490): 291–6. Bibcode:2000Sci...290..291F. doi:10.1126/science.290.5490.291. PMID 11030643.
  141. ^ "Releasing herds of animals into the Arctic could help fight climate change, study finds". CBS News. April 20, 2020. Retrieved July 10, 2020.
  142. ^ K. M. Walter; S. A. Zimov; J. P. Chanton; D. Verbyla; F.S. Chapin III (7 September 2006). "Methane bubbling from Siberian thaw lakes as a positive feedback to climate warming". Nature. 443 (7107): 71–5. Bibcode:2006Natur.443...71W. doi:10.1038/nature05040. PMID 16957728. S2CID 4415304.
  143. ^ Rosane, Olivia (18 March 2020). "Protecting and Restoring Soils Could Remove 5.5 Billion Tonnes of CO2 a Year". Ecowatch. Retrieved 19 March 2020.
  144. ^ a b "CO2 turned into stone in Iceland in climate change breakthrough". The Guardian. 9 June 2016. Retrieved 2 September 2017.
  145. ^ a b Robinson, Simon (2010-01-22). "How to Reduce Carbon Emissions: Capture and Store it?". Retrieved 2010-08-26.
  146. ^ "Carbon Capture and Sequestration Technologies @ MIT". Retrieved 2020-01-24.
  147. ^ Drajem, Mark (April 14, 2014). "Coal's Best Hope Rising With Costliest U.S. Power Plant". Bloomberg Business.
  148. ^ IPCC (2007). C. Mitigation in the short and medium term (until 2030). In (book section): Summary for Policymakers. In: Climate Change 2007: Mitigation. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (B. Metz et al. (eds.)). Print version: Cambridge University Press, Cambridge, UK, and New York, NY, US. This version: IPCC website. ISBN 978-0-521-88011-4. Archived from the original on 2010-05-02. Retrieved 2010-05-15.
  149. ^ a b Policy Implications of Greenhouse Warming: Mitigation, Adaptation, and the Science Base (1992), Committee on Science, Engineering, and Public Policy (COSEPUP)
  150. ^ GAO (2011). Technical status, future directions, and potential responses. July 2011. GAO-11-71
  151. ^ The Royal Society, (2009) "Geoengineering the climate: science, governance and uncertainty". Retrieved 2009-09-12.
  152. ^ Launder B.; J.M.T. Thompson (2008). "Global and Arctic climate engineering: numerical model studies". Phil. Trans. R. Soc. A. 366 (1882): 4039–4056. Bibcode:2008RSPTA.366.4039C. doi:10.1098/rsta.2008.0132. PMID 18757275.
  153. ^ "What is sustainable agriculture | Agricultural Sustainability Institute". Retrieved 2019-01-20.
  154. ^ Scanlon, Kerry. "Trends in Sustainability: Regenerative Agriculture". Rainforest Alliance. Retrieved 29 October 2019.
  155. ^ "What Is Regenerative Agriculture?". Ecowatch. The Climate Reality Project. July 2, 2019. Retrieved 3 July 2019.
  156. ^ "Agriculture: Sources of Greenhouse Gas Emissions by Sector". EPA. 2019.
  157. ^ FAO Agriculture and Consumer Protection Department (2006). "Livestock impacts on the environment". Food and Agriculture Organization of the United Nations. Archived from the original (PDF) on August 28, 2015. Retrieved October 25, 2016.
  158. ^ Bovine genomics project at Genome Canada
  159. ^ Canada is using genetics to make cows less gassy
  160. ^ The use of direct-fed microbials for mitigation of ruminant methane emissions: a review
  161. ^ Parmar, N.R.; Nirmal Kumar, J.I.; Joshi, C.G. (2015). "Exploring diet-dependent shifts in methanogen and methanotroph diversity in the rumen of Mehsani buffalo by a metagenomics approach". Frontiers in Life Science. 8 (4): 371–378. doi:10.1080/21553769.2015.1063550. S2CID 89217740.
  162. ^ Boadi, D (2004). "Mitigation strategies to reduce enteric methane emissions from dairy cows: Update review". Can. J. Anim. Sci. 84 (3): 319–335. doi:10.4141/a03-109.
  163. ^ Martin, C. et al. 2010. Methane mitigation in ruminants: from microbe to the farm scale. Animal 4 : pp 351-365.
  164. ^ Eckard, R. J.; et al. (2010). "Options for the abatement of methane and nitrous oxide from ruminant production: A review". Livestock Science. 130 (1–3): 47–56. doi:10.1016/j.livsci.2010.02.010.
  165. ^ Livestock Farming Systems and their Environmental Impact
  166. ^ Susan S. Lang (13 July 2005). "Organic farming produces same corn and soybean yields as conventional farms, but consumes less energy and no pesticides, study finds". Retrieved 8 July 2008.
  167. ^ Pimentel, David; Hepperly, Paul; Hanson, James; Douds, David; Seidel, Rita (2005). "Environmental, Energetic, and Economic Comparisons of Organic and Conventional Farming Systems". BioScience. 55 (7): 573–82. doi:10.1641/0006-3568(2005)055[0573:EEAECO]2.0.CO;2.
  168. ^ Lal, Rattan; Griffin, Michael; Apt, Jay; Lave, Lester; Morgan, M. Granger (2004). "Ecology: Managing Soil Carbon". Science. 304 (5669): 393. doi:10.1126/science.1093079. PMID 15087532. S2CID 129925989.
  169. ^ A. N. (Thanos) Papanicolaou; Kenneth M. Wacha; Benjamin K. Abban; Christopher G. Wilson; Jerry L. Hatfield; Charles O. Stanier; Timothy R. Filley (2015). "Conservation Farming Shown to Protect Carbon in Soil". Journal of Geophysical Research: Biogeosciences. 120 (11): 2375–2401. Bibcode:2015JGRG..120.2375P. doi:10.1002/2015JG003078.
  170. ^ "Cover Crops, a Farming Revolution With Deep Roots in the Past". The New York Times. 2016.
  171. ^ Lugato, Emanuele; Bampa, Francesca; Panagos, Panos; Montanarella, Luca; Jones, Arwyn (2014-11-01). "Potential carbon sequestration of European arable soils estimated by modelling a comprehensive set of management practices". Global Change Biology. 20 (11): 3557–3567. Bibcode:2014GCBio..20.3557L. doi:10.1111/gcb.12551. ISSN 1365-2486. PMID 24789378.
  172. ^ Burp vaccine cuts greenhouse gas emissions Rachel Nowak for NewScientist September 2004
  173. ^ Hoffner, Erik (October 25, 2019). "Grand African Savannah Green Up': Major $85 Million Project Announced to Scale up Agroforestry in Africa". Ecowatch. Retrieved 27 October 2019.
  174. ^ World Energy Council (2007). "Transport Technologies and Policy Scenarios". World Energy Council. Archived from the original on 2008-12-04. Retrieved 2009-05-26.
  175. ^ Lowe, Marcia D. (April 1994). "Back on Track: The Global Rail Revival". Archived from the original on 2006-12-04. Retrieved 2007-02-15.
  176. ^ Schwartzman, Peter. "TRUCKS VS. TRAINS—WHO WINS?". Retrieved 2007-02-15.
  177. ^ "The Future of the Canals" (PDF). London Canal Museum. Retrieved 8 September 2013.
  178. ^ "Energy Saving Trust: Home and the environment". Energy Saving Trust. Archived from the original on 2008-08-29. Retrieved 2010-08-26.
  179. ^ Osborne, Hilary (2005-08-02). "Energy efficiency 'saves £350m a year'". Guardian Unlimited. London.
  180. ^ Rosenfeld, Arthur H.; Romm, Joseph J.; Akbari, Hashem; Lloyd, Alan C. (February–March 1997). "Technology Review". Painting the Town White – and Green. Massachusetts Institute of Technology. Archived from the original on 2005-11-08. Retrieved 2005-11-21.
  181. ^ Committee on Science, Engineering; Public Policy (1992). Policy Implications of Greenhouse Warming: Mitigation, Adaptation, and the Science Base. Washington, D.C.: National Academy Press. ISBN 978-0-309-04386-1.
  182. ^ Population Connection Archived 2015-01-11 at the Wayback Machine Statement of Policy
  183. ^ Roberts, David (2017-07-14). "The best way to reduce your personal carbon emissions: don't be rich". Vox. Retrieved 2019-10-22.
  184. ^ Carrington, Damian (2017-07-12). "Want to fight climate change? Have fewer children". The Guardian. ISSN 0261-3077. Retrieved 2019-10-22.
  185. ^ To the point of farce: a martian view of the hardinian taboo—the silence that surrounds population control Maurice King, Charles Elliott BMJ
  186. ^ Who is Heating Up the Planet? A Closer Look at Population and Global Warming Archived 2011-08-22 at the Wayback Machine from Sierra Club
  187. ^ Sampedro et al. 2020.
  188. ^ a b "Can cost benefit analysis grasp the climate change nettle? And can we…". Oxford Martin School. Retrieved 2019-11-11.
  189. ^ "One Earth Climate Model". One Earth Climate Model. University of Technology, Climate and Energy College, German Aerospace Center. Retrieved 22 January 2019.
  190. ^ Chow, Lorraine (21 January 2019). "DiCaprio-Funded Study: Staying Below 1.5ºC is Totally Possible". Ecowatch. Retrieved 22 January 2019.
  191. ^ One Earth Climate Model
  192. ^ Achieving the Paris Climate Agreement goals
  193. ^ Inaction on climate change risks leaving future generations $530 trillion in debt
  194. ^ Young people's burden: requirement of negative CO2 emissions
  195. ^ "Summary of Solutions by Overall Rank". Drawdown. 2017-04-05. Retrieved 2020-02-12.
  196. ^ Sampedro et al. 2020.
  197. ^ Rogner, H.-H.; et al. (2007). Executive Summary. In (book chapter): Introduction. In: Climate Change 2007: Mitigation. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (B. Metz et al. (eds)). Print version: Cambridge University Press, Cambridge, United Kingdom and New York, NY. Web version: IPCC website. ISBN 978-0-521-88011-4. Retrieved 2010-05-05.
  198. ^ a b c Banuri, T.; et al. (1996). Equity and Social Considerations. In: Climate Change 1995: Economic and Social Dimensions of Climate Change. Contribution of Working Group III to the Second Assessment Report of the Intergovernmental Panel on Climate Change (J.P. Bruce et al. Eds.). This version: Printed by Cambridge University Press, Cambridge, UK, and New York, NY, US. PDF version: IPCC website. doi:10.2277/0521568544. ISBN 978-0-521-56854-8.
  199. ^ "Behaviour change, public engagement and Net Zero (Imperial College London)". Committee on Climate Change. Retrieved 2019-11-21.
  200. ^ a b Goldemberg, J.; et al. (1996). Introduction: scope of the assessment. In: Climate Change 1995: Economic and Social Dimensions of Climate Change. Contribution of Working Group III to the Second Assessment Report of the Intergovernmental Panel on Climate Change (J.P. Bruce et al. Eds.). This version: Printed by Cambridge University Press, Cambridge, UK, and New York, NY, US. Web version: IPCC website. doi:10.2277/0521568544. ISBN 978-0-521-56854-8.
  201. ^ Article "Adaptation. If you can't stand the heat", The Economist, special report on "Climate change", 28 November 2015, page 10-12.
  202. ^ Harvey, Fiona (26 November 2019). "UN calls for push to cut greenhouse gas levels to avoid climate chaos". The Guardian. Retrieved 27 November 2019.
  203. ^ "Cut Global Emissions by 7.6 Percent Every Year for Next Decade to Meet 1.5°C Paris Target - UN Report". United Nations Framework Convention on Climate Change. United Nations. Retrieved 27 November 2019.
  204. ^ "Global climate action from cities, regions and businesses – 2019". New Climate Institute. 17 September 2019. Retrieved 15 December 2019.
  205. ^ Farland, Chloe (2019-10-02). "This is what the world promised at the UN climate action summit". Climate Home News. Retrieved 15 December 2019.
  206. ^ "Global Climate Action Presents a Blueprint for a 1.5-Degree World". UNFCCC. Retrieved 15 December 2019.
  207. ^ "Global Data Community Commits to Track Climate Action". UNFCCC. Retrieved 15 December 2019.
  208. ^ "UNFCCC eHandbook: Summary of the Paris Agreement". Retrieved 2019-11-12.
  209. ^ Climate Action Tracker
  210. ^ "Global climate action from cities, regions and businesses – 2019". New Climate Institute. 17 September 2019. Retrieved 15 December 2019.
  211. ^ Farland, Chloe (2019-10-02). "This is what the world promised at the UN climate action summit". Climate Home News. Retrieved 15 December 2019.
  212. ^ "Global Climate Action Presents a Blueprint for a 1.5-Degree World". UNFCCC. Retrieved 15 December 2019.
  213. ^ "Global Data Community Commits to Track Climate Action". UNFCCC. Retrieved 15 December 2019.
  214. ^ IPCC SR15 Summary for Policymakers 2018, p. 4
  215. ^ Oppenheimer, M., et al., Section 19.7.2: Limits to Mitigation, in: Chapter 19: Emergent risks and key vulnerabilities (archived July 8 2014), pp. 49–50, in IPCC AR5 WG2 A 2014
  216. ^ "Report on the structured expert dialogue on the 2013–2015 review" (PDF). UNFCCC, Subsidiary Body for Scientific and Technological Advice & Subsidiary Body for Implementation. 2015-04-04. Retrieved 2016-06-21.
  217. ^ "1.5°C temperature limit – key facts". Climate Analytics. Archived from the original on 2016-06-30. Retrieved 2016-06-21.
  218. ^ a b c d e Gupta, S.; et al. (2007). " Taxes and charges". In B. Metz; et al. (eds.). Policies, instruments, and co-operative arrangements. Climate Change 2007: Mitigation. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Print version: Cambridge University Press, Cambridge, UK, and New York, NY. This version: IPCC website. Archived from the original on 2010-10-29. Retrieved 2010-03-18.
  219. ^ Vourc'h, A.; M. Jimenez (2000). "Enhancing Environmentally Sustainable Growth in Finland. Economics Department Working Papers No. 229" (PDF). OECD website. Retrieved 2010-04-21.
  220. ^ Hyun-cheol, Kim (August 22, 2008). "Carbon Tax to Be Introduced in 2010". The Korea Times. Retrieved August 4, 2010.
  221. ^ Farah, Paolo Davide (2015). "Sustainable Energy Investments and National Security: Arbitration and Negotiation Issues". Journal of World Energy Law and Business. 8 (6). SSRN 2695579.
  222. ^ Climate Change: The Investment Perspective (PDF). Ernst and Young. 2016. p. 2.
  223. ^ How high-pressure politics threatens action on climate The Observer June 2005
  224. ^ (2009) "The Story of Cap and Trade" Archived 2010-07-22 at the Wayback Machine
  225. ^ "Success of Northeast Cap-and-Trade System Shows Market-Based Climate Policy Is Well Within Reach". Archived from the original on 2019-01-08. Retrieved 2014-10-19.
  226. ^ Emission Trading Scheme (EU ETS) from
  227. ^ The $20,000,000,000,000 question Archived 2005-06-15 at the Wayback Machine Robins, Nick for Opendemocracy
  228. ^ State and Trends of the Carbon Market Archived 2008-05-29 at the Wayback Machine International Emissions Trading Association 2005
  229. ^ Statement of G8 Climate Change Roundtable Archived May 8, 2013, at the Wayback Machine Convened by the World Economic Forum June 2005
  230. ^ a b Friedlingstein et al. 2019, Table 7.
  231. ^ a b c Evans. J (forthcoming 2012) Environmental Governance, Routledge, Oxon
  232. ^ Mee. L. D, Dublin. H. T, Eberhard. A. A (2008) Evaluating the Global Environment Facility: A goodwill gesture or a serious attempt to deliver global benefits?, Global Environmental Change 18, 800–810
  233. ^ a b c Overland, Indra; Sovacool, Benjamin K. (2020-04-01). "The misallocation of climate research funding". Energy Research & Social Science. 62: 101349. doi:10.1016/j.erss.2019.101349. ISSN 2214-6296.
  234. ^ Biesbroek. G.R, Termeer. C.J.A.M, Kabat. P, Klostermann.J.E.M (unpublished) Institutional governance barriers for the development and implementation of climate adaptation strategies, Working paper for the International Human Dimensions Programme (IHDP) conference "Earth System Governance: People, Places, and the Planet", December 2–4, Amsterdam, the Netherlands
  235. ^ Elinor Ostrom (October 2009). "A Polycentric Approach for Coping with Climate Change" (PDF). Policy Research Working Paper Series. World Bank. Archived from the original (PDF) on 2013-11-01.
  236. ^ Tokimatsu, Koji; Wachtmeister, Henrik; McLellan, Benjamin; Davidsson, Simon; Murakami, Shinsuke; Höök, Mikael; Yasuoka, Rieko; Nishio, Masahiro (December 2017). "Energy modeling approach to the global energy-mineral nexus: A first look at metal requirements and the 2 °C target". Applied Energy. 207: 494–509. doi:10.1016/j.apenergy.2017.05.151.
  237. ^ a b Preston. B. L, Westaway. R. M, Yuen. E. Y (2004) Climate adaptation planning in practice: an evaluation of adaptation plans from three developed nations, European Management Journal, 22(3) 304–314
  238. ^ UNFCCC (2011) Report on the twentieth meeting of the Least Developed Countries Expert Group, Subsidiary Body for Implementation, United Nations Framework Convention on Climate Change
  239. ^ UNFCCC (2011) Annual report of the Joint Implementation Supervisory Committee to the Conference of the Parties serving as the meeting of the Parties to the Kyoto Protocol, United Nations Framework Convention on Climate Change
  240. ^ Velders, G.J.M.; et al. (20 March 2007). "The importance of the Montreal Protocol in protecting climate". PNAS. 104 (12): 4814–19. Bibcode:2007PNAS..104.4814V. doi:10.1073/pnas.0610328104. PMC 1817831. PMID 17360370.
  241. ^ World Bank Group (2019-06-06), State and Trends of Carbon Pricing 2019
  242. ^ "Industrial Technologies Program: BestPractices". Retrieved 2010-08-26.
  243. ^ Barringer, Felicity (2012-10-13). "In California, a Grand Experiment to Rein in Climate Change". The New York Times.
  244. ^ Kahn, Brian (April 13, 2019). "Minnesota Introduces Bold New Climate Change Bill Crafted by Teens". Gizmodo. Retrieved 15 April 2019.
  245. ^ Sims Gallagher, Kelly; Zhang, Fang. "China is positioned to lead on climate change as the US rolls back its policies". The Conversation. Retrieved 13 September 2019.
  246. ^ "2050 long-term strategy". European Commission. Retrieved 21 November 2019.
  247. ^ "Paris Agreement". European Commission. Retrieved 21 November 2019.
  248. ^ "2020 climate & energy package". European Commission. Retrieved 21 November 2019.
  249. ^ "2030 climate & energy framework". European Commission. Retrieved 21 November 2019.
  250. ^ "The European Parliament declares climate emergency". European Parliament. Retrieved 3 December 2019.
  251. ^ "2050 long-term strategy". European Commission. Retrieved 21 November 2019.
  252. ^ "Progress made in cutting emissions". European Commission. Retrieved 21 November 2019.
  253. ^ Ainge Roy, Eleanor (4 December 2019). "Climate change to steer all New Zealand government decisions from now on". The Dunedin. The Guardian. Retrieved 4 December 2019.
  254. ^ Prototype Carbon Fund from the World Bank Carbon Finance Unit
  255. ^ a b c d Jessica Brown, Neil Bird and Liane Schalatek (2010) Climate finance additionality: emerging definitions and their implications Overseas Development Institute
  256. ^ Free trade can help combat global warming, finds UN report UN News Centre, 26 June 2009
  257. ^ "Latin America and Caribbean Climate Week 2019 Key Messages for the UN Climate Action Summit" (PDF). Latin America and Caribbean Climate Week 2019. Retrieved 25 August 2019.
  258. ^ "Latin American & Caribbean Climate Week Calls for Urgent, Ambitious Action". United Nations Climate Change. Retrieved 25 August 2019.
  259. ^ Andrew Biggin (16 August 2007). "Scientific bodies must take own action on emissions". Nature. 448 (7155): 749. Bibcode:2007Natur.448..749B. doi:10.1038/448749a. PMID 17700677.
  260. ^ Anderson, K; Bows, A (2008). "Reframing the climate change challenge in light of post-2000 emission trends". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 366 (1882): 3863–82. Bibcode:2008RSPTA.366.3863A. doi:10.1098/rsta.2008.0138. PMID 18757271. S2CID 8242255.
  261. ^ Anderson, K (June 17, 2008). "Reframing climate change: from long-term targets to emission pathways". (esp. slide 24 onward)
  262. ^ Gössling S, Ceron JP, Dubois G, Hall CM, Gössling IS, Upham P, Earthscan London (2009). Hypermobile travellers. and Implications for Carbon Dioxide Emissions Reduction. In: Climate Change and Aviation: Issues, Challenges and Solutions, London. The chapter: Chapter 6 Archived 2010-06-19 at the Wayback Machine
  263. ^ "5 Mutual Funds for Socially Responsible Investors". Kiplinger.
  264. ^ "Investing to Curb Climate Change" (PDF). USSIF. p. 2.
  265. ^ "Video: Paradise lost? – Need to Know". PBS. Palau suing the industrialized countries over global warming
  266. ^ Inuit suing the US in regards to global warming Archived August 25, 2010, at the Wayback Machine
  267. ^ "Environmental Integrity Project, Sierra Club Announce Plans to Sue EPA Unless It Revises Nitrogen Oxide Emissions Standard, Curbs Nitrous Oxide Pollution Linked to Global Warming – – Tulsa, OK – News, Weather, Video and Sports – -". Archived from the original on 2016-01-11. Retrieved 2013-02-19.
  268. ^ Edward Lorenz (1982): "Climate is what you expect, weather is what you get"
  269. ^ Stott, et al. (2004), "Human contribution to the European heatwave of 2003", Nature, Vol. 432, 2 December 2004
  270. ^ Grossman, Columbia J. of Env. Law, 2003
  271. ^ "Climate change 'ruining' Everest". 2004-11-17. Retrieved 2010-08-26.
  272. ^ Climate change 'ruining' Belize BBC November 2004
  273. ^ Climate Justice Archived 2019-06-18 at the Wayback Machine Ongoing Cases
  274. ^ Hague, Arthur Neslen The (24 June 2015). "Dutch government ordered to cut carbon emissions in landmark ruling". The Guardian.
  275. ^ "Klimaat en Energie – Thema's – Urgenda – Samen Sneller Duurzaam".
  276. ^ "VPRO Tegenlicht".
  277. ^ "Klimaatzaak".
  278. ^ "Over ons – Klimaatzaak". Archived from the original on 2016-08-18. Retrieved 2016-06-25.
  279. ^ Press release (29 January 2004). Archived press release: Exxonmobil's contribution to global warming revealed. Friends of the Earth Trust. Retrieved May 25, 2015.
  280. ^ "New York is investigating Exxon Mobil for allegedly misleading the public about climate change". The Washington Post. November 5, 2015. Retrieved December 29, 2015.
  281. ^ Cook, John; Supran, Geoffrey; Oreskes, Naomi; Maibach, Ed; Lewandowsky, Stephan (24 October 2019). "Exxon has misled Americans on climate change for decades. Here's how to fight back". The Guardian. Retrieved 27 October 2019.
  282. ^ Hirji, Zahra (October 24, 2019). "Massachusetts Is Now The Second State Suing The Oil Giant Exxon Over Climate Change". Retrieved 27 October 2019.
  283. ^ Rosane, Olivia (14 August 2019). "29 States and Cities Sue to Block Trump's 'Dirty Power' Rule". Ecowatch. Retrieved 15 August 2019.
  284. ^ "Major milestone: 1000+ divestment commitments". Retrieved 17 December 2018.
  285. ^ Josh Gabbatiss, Josh (15 December 2018). "Teenage activist inspires school strikes to protest climate change after telling leaders they are 'not mature enough'". The Independent. Retrieved 17 December 2018.
  286. ^ Conley, Julia. "I'm Sure Dinosaurs Thought They Had Time, Too': Over 12,000 Students Strike in Brussels Demanding Bold Climate Action". Common Dreams. Retrieved 20 January 2019.
  287. ^ "Extinction Rebellion: Climate protesters block roads". BBC. 16 April 2019. Retrieved 16 April 2019.
  288. ^ Ruiz, Irene Banos (June 22, 2019). "Climate Action: Can We Change the Climate From the Grassroots Up?". Ecowatch. Deutsche Welle. Retrieved 23 June 2019.
  289. ^ Zoe Low, Zoe (18 July 2019). "Asia's young climate activists on joining the worldwide campaign for government action on global warming". South China Morning Post. Retrieved 5 August 2019.
  290. ^ Korte, Kate (July 10, 2019). "Elizabeth May holds nonpartisan town hall at UVic for constituents". Martlet Publishing Society. Retrieved 2 August 2019.
  291. ^ Conley, Julia (23 September 2019). "4 Million Attend Biggest Climate Protest in History, Organizers Declare 'We're Not Through'". Ecowatch. Retrieved 23 September 2019.
  292. ^ Experimental investigation of solar water heater. "Solar water heating".