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Fossil fuel
Fuel formed over millions of years from dead plants and animals

Fossil fuels are naturally formed hydrocarbon compounds found in the Earth's crust, derived from prehistoric organisms through anaerobic decomposition over millions of years, making them non-renewable resources. Common types include coal, petroleum, and natural gas, used for energy, transportation, and electricity via steam turbines. In 2023, fossil fuels accounted for 77% of global energy consumption. Their combustion produces most greenhouse gases, driving global warming and ocean acidification. Due to environmental and health impacts, a policy transition toward renewable energy is underway, supported by international agreements like the Paris Climate Agreement and goals set by the United Nations.

Origin

The theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in Earth's crust over millions of years was first introduced by Andreas Libavius "in his 1597 Alchemia [Alchymia]" and later by Mikhail Lomonosov "as early as 1757 and certainly by 1763".20 The first recorded use of the term "fossil fuel" occurs in the work of the German chemist Caspar Neumann, in English translation in 1759.21 The Oxford English Dictionary notes that, in the phrase "fossil fuel," the adjective "fossil" means "[o]btained by digging; found buried in the earth", which dates to at least 1652,22 before the English noun "fossil" came to refer primarily to long-dead organisms in the early 18th century.23

Aquatic phytoplankton and zooplankton that died and sedimented in large quantities under anoxic conditions millions of years ago began forming petroleum and natural gas as a result of anaerobic decomposition. Over geological time this organic matter, mixed with mud, became buried under further heavy layers of inorganic sediment. The resulting high temperature and pressure caused the organic matter to chemically alter, first into a waxy material known as kerogen, which is found in oil shales, and then with more heat into liquid and gaseous hydrocarbons in a process known as catagenesis. Despite these heat-driven transformations, the energy released in combustion is still photosynthetic in origin.24

Terrestrial plants tended to form coal and methane. Many of the coal fields date to the Carboniferous period of Earth's history. Terrestrial plants also form type III kerogen, a source of natural gas. Although fossil fuels are continually formed by natural processes, they are classified as non-renewable resources because they take millions of years to form and known viable reserves are being depleted much faster than new ones are generated.2526

Importance

See also: Fossil fuel power station

Fossil fuels have been important to human development because they can be readily burned in the open atmosphere to produce heat. The use of peat as a domestic fuel predates recorded history. Coal was burned in some early furnaces for the smelting of metal ore, while semi-solid hydrocarbons from oil seeps were also burned in ancient times,27 they were mostly used for waterproofing and embalming.28

Commercial exploitation of petroleum began in the 19th century.29

Natural gas, once flared-off as an unneeded byproduct of petroleum production, is now considered a very valuable resource.30 Natural gas deposits are also the main source of helium.

Heavy crude oil, which is much more viscous than conventional crude oil, and oil sands, where bitumen is found mixed with sand and clay, began to become more important as sources of fossil fuel in the early 2000s.31 Oil shale and similar materials are sedimentary rocks containing kerogen, a complex mixture of high-molecular weight organic compounds, which yield synthetic crude oil when heated (pyrolyzed). With additional processing, they can be employed instead of other established fossil fuels. During the 2010s and 2020s there was disinvestment from exploitation of such resources due to their high carbon cost relative to more easily-processed reserves.32

Prior to the latter half of the 18th century, windmills and watermills provided the energy needed for work such as milling flour, sawing wood or pumping water, while burning wood or peat provided domestic heat. The wide-scale use of fossil fuels, coal at first and petroleum later, in steam engines enabled the Industrial Revolution. At the same time, gas lights using natural gas or coal gas were coming into wide use. The invention of the internal combustion engine and its use in automobiles and trucks greatly increased the demand for gasoline and diesel oil, both made from fossil fuels. Other forms of transportation, railways and aircraft, also require fossil fuels. The other major use for fossil fuels is in generating electricity and as feedstock for the petrochemical industry. Tar, a leftover of petroleum extraction, is used in the construction of roads.

The energy for the Green Revolution was provided by fossil fuels in the form of fertilizers (natural gas), pesticides (oil), and hydrocarbon-fueled irrigation.3334 The development of synthetic nitrogen fertilizer has significantly supported global population growth; it has been estimated that almost half of the Earth's population are currently fed as a result of synthetic nitrogen fertilizer use.35 According to head of a fertilizers commodity price agency, "50% of the world's food relies on fertilisers."36

Environmental effects

Main articles: Effects of climate change and Health and environmental impact of the coal industry

See also: Extinction risk from climate change

The burning of fossil fuels has a number of negative externalities – harmful environmental impacts where the effects extend beyond the people using the fuel. These effects vary between different fuels. All fossil fuels release CO2 when they burn, thus accelerating climate change. Burning coal, and to a lesser extent oil and its derivatives, contributes to atmospheric particulate matter, smog and acid rain.373839 Air pollution from fossil fuels in 2018 has been estimated to cost US$2.9 trillion, or 3.3% of the global gross domestic product (GDP).40

Climate change is largely driven by the release of greenhouse gases like CO2, and the burning of fossil fuels is the main source of these emissions. In most parts of the world climate change is negatively impacting ecosystems.41 This includes contributing to the extinction of species and reducing people's ability to produce food, thus adding to the problem of world hunger. Continued rises in global temperatures will lead to further adverse effects on both ecosystems and people; the World Health Organization has said that climate change is the greatest threat to human health in the 21st century.4243

Combustion of fossil fuels generates sulfuric and nitric acids, which fall to Earth as acid rain, impacting both natural areas and the built environment. Monuments and sculptures made from marble and limestone are particularly vulnerable, as the acids dissolve calcium carbonate.

Fossil fuels also contain radioactive materials, mainly uranium and thorium, which are released into the atmosphere. In 2000, about 12,000 tonnes of thorium and 5,000 tonnes of uranium were released worldwide from burning coal.44 It is estimated that during 1982, US coal burning released 155 times as much radioactivity into the atmosphere as the Three Mile Island accident.45

Burning coal also generates large amounts of bottom ash and fly ash. These materials are used in a wide variety of applications (see Fly ash reuse), utilizing, for example, about 40% of the United States production.46

In addition to the effects that result from burning, the harvesting, processing, and distribution of fossil fuels also have environmental effects. Coal mining methods, particularly mountaintop removal and strip mining, have negative environmental impacts, and offshore oil drilling poses a hazard to aquatic organisms. Fossil fuel wells can contribute to methane release via fugitive gas emissions. Oil refineries also have negative environmental impacts, including air and water pollution. Coal is sometimes transported by diesel-powered locomotives, while crude oil is typically transported by tanker ships, requiring the combustion of additional fossil fuels.

A variety of mitigating efforts have arisen to counter the negative effects of fossil fuels. This includes a movement to use alternative energy sources, such as renewable energy. Environmental regulation uses a variety of approaches to limit these emissions; for example, rules against releasing waste products like fly ash into the atmosphere.47

In December 2020, the United Nations released a report saying that despite the need to reduce greenhouse emissions, various governments are "doubling down" on fossil fuels, in some cases diverting over 50% of their COVID-19 recovery stimulus funding to fossil fuel production rather than to alternative energy. The UN secretary general António Guterres declared that "Humanity is waging war on nature. This is suicidal. Nature always strikes back – and it is already doing so with growing force and fury." He also claimed there is still cause for hope, anticipating the US plan to join other large emitters like China and the EU in adopting targets to reach net zero emissions by 2050.484950

Inflation effects

Fossilflation is a term that describes the impact of fossil fuels on inflation.5152

According to Vox in August 2022, "Economists have pointed to energy prices as the main reason for high inflation", noting that "energy prices indirectly affect virtually every part of the economy".53 Sectors that raise prices significantly as a result of higher fossil fuel prices include transportation, food, and shipping.54

History

Mark Zandi of Moody's says that fossil fuel prices have driven every big episode of inflation since WWII.55

The economic impact of the Russian Invasion of Ukraine in 2022 was a major recent example of fossil fuels causing inflation.56 Some economists, including Isabel Schnabel, believe that dependence on fossil fuels is the main driver of the 2021-2022 inflation spike.5758

Efforts to combat fossilflation

Gernot Wagner argues that commodities are undesirable energy sources because they are susceptible to volatile price swings that technologies like renewable energy are not. He also argues that technologies improve and get relatively cheaper over time.5960 Coming out of the COVID-19 pandemic, some argued for the possibility of a base effect phenomenon due to cheaper than normal prices, such as for oil, at the onset of the pandemic, followed by above-average prices which exacerbated the perceived inflation.6162

Inflation Reduction Act

While not expected to provide much short-term relief, the Inflation Reduction Act seeks to make the United States less dependent on fossil fuels and their ability to cause inflation in the economy.636465 Moody's estimates that by 2030, the bill could reduce the typical American household's spending on energy by more than $300 each year, in 2022 dollars.66

Illness and deaths

Environmental pollution from fossil fuels impacts humans because particulates and other air pollution from fossil fuel combustion may cause illness and death when inhaled. These health effects include premature death, acute respiratory illness, aggravated asthma, chronic bronchitis and decreased lung function. The poor, undernourished, very young and very old, and people with preexisting respiratory disease and other ill health are more at risk.67 Global air pollution deaths due to fossil fuels have been estimated at over 8 million people (2018, nearly 1 in 5 deaths worldwide)68 at 10.2 million (2019),69 and 5.13 million excess deaths from ambient air pollution from fossil fuel use (2023).70

While all energy sources inherently have adverse effects, the data show that fossil fuels cause the highest levels of greenhouse gas emissions and are the most dangerous for human health. In contrast, modern renewable energy sources appear to be safer for human health and cleaner. The death rates from accidents and air pollution in the EU are as follows per terawatt-hour (TWh):

Energy sourceNos. of deathsper TWhGreenhouse gasemissions(thousand tonnes/TWh)
Coal24.6820
Oil18.4720
Natural gas2.8490
Biomass4.678–230
Hydropower0.0234
Nuclear energy0.073
Wind0.044
Solar0.025

71 As the data shows, coal, oil, natural gas, and biomass cause higher death rates and higher levels of greenhouse gas emissions than hydropower, nuclear energy, wind, and solar power. Scientists propose that 1.8 million lives have been saved by replacing fossil fuel sources with nuclear power.72

Phase-out

This paragraph is an excerpt from Fossil fuel phase-out.[edit]

Fossil fuel phase-out is the proposed gradual global reduction of the use and production of fossil fuels to zero, to reduce air pollution, limit climate change, and strengthen energy independence. It is part of the ongoing renewable energy transition.

Just transition

This section is an excerpt from Just transition.[edit]

Just transition is a concept that emerged in the 1980s through efforts by U.S. trade unions to protect workers' rights and livelihoods as economies shift to sustainable production, primarily protecting workers affected by environmental regulations.<re>"Climate Frontlines Briefing – No Jobs on a Dead Planet" (PDF). International Trade Union Confederation. March 2015. Retrieved 27 March 2020.</ref> Since then, it has evolved and gained global recognition, including having a place in the Paris Agreement in 2015. A just transition focuses on the connection between energy transition and equitable approaches to decarbonization that support broader development goals.7374 A growing number of countries are incorporating just transition strategies to achieve ambitious climate goals, with 38% of 170 countries referring to just transition in their short-term climate plans as of 2022.75

Divestment

This section is an excerpt from Fossil fuel divestment.[edit]

Fossil fuel divestment or fossil fuel divestment and investment in climate solutions is an attempt to reduce climate change by exerting social, political, and economic pressure for the institutional divestment of assets including stocks, bonds, and other financial instruments connected to companies involved in extracting fossil fuels.76

Fossil fuel divestment campaigns emerged on college and university campuses in the United States in 2011 with students urging their administrations to turn endowment investments in the fossil fuel industry into investments in clean energy and communities most impacted by climate change.77 In 2012, Unity College in Maine became the first institution of higher learning to divest78 its endowment from fossil fuels.

By 2015, fossil fuel divestment was reportedly the fastest growing divestment movement in history.79 As of July 2023, more than 1593 institutions with assets totalling more than $40.5 trillion in assets worldwide had begun or committed some form of divestment of fossil fuels.80

Divesters cite several reasons for their decisions. To some, it is a means of aligning investments with core values; to others, it is a tactic for combatting the fossil fuel industry; to others, it is a way to protect portfolios from climate-related financial risk.81 Financial research suggests that, in the longer term, fossil fuel divestment has positively impacted investors' returns.8283

Industrial sector

Main articles: Coal industry and Petroleum industry

Further information: Fossil fuel exporters and Fossil fuels lobby

In 2019, Saudi Aramco was listed and it reached a US$2 trillion valuation on its second day of trading,84 after the world's largest initial public offering.85

Subsidies

This section is an excerpt from Fossil fuel subsidies.[edit]

Fossil fuel subsidies are energy subsidies on fossil fuels. Under a narrow definition, fossil fuel subsidies totalled around $1.5 trillion in 2022.86 Under more expansive definition, they totalled around $7 trillion.87 They may be tax breaks on consumption, such as a lower sales tax on natural gas for residential heating; or subsidies on production, such as tax breaks on exploration for oil. Or they may be free or cheap negative externalities; such as air pollution or climate change due to burning gasoline, diesel and jet fuel. Some fossil fuel subsidies are via electricity generation, such as subsidies for coal-fired power stations.

Eliminating fossil fuel subsidies would reduce the health risks of air pollution,88 and would greatly reduce global carbon emissions thus helping to limit climate change.89 As of 2021, policy researchers estimate that substantially more money is spent on fossil fuel subsidies than on environmentally harmful agricultural subsidies or environmentally harmful water subsidies.90 The International Energy Agency says: "High fossil fuel prices hit the poor hardest, but subsidies are rarely well-targeted to protect vulnerable groups and tend to benefit better-off segments of the population."91

Despite the G20 countries having pledged to phase-out inefficient fossil fuel subsidies,92 as of 2023 they continue because of voter demand,9394 or for energy security.95

Lobbying activities

These paragraphs are an excerpt from Fossil fuels lobby.[edit]

The fossil fuels lobby includes paid representatives of corporations involved in the fossil fuel industry (oil, gas, coal), as well as related industries like chemicals, plastics, aviation and other transportation.96 Because of their wealth and the importance of energy, transport and chemical industries to local, national and international economies, these lobbies have the capacity and money to attempt to have outsized influence on governmental policy. In particular, the lobbies have been known to obstruct policy related to environmental protection, environmental health and climate action.97

Lobbies are active in most fossil-fuel intensive economies with democratic governance, with reporting on the lobbies most prominent in Canada, Australia, the United States and Europe; however, the lobbies are present in many parts of the world. Big Oil companies such as ExxonMobil, Shell, BP, TotalEnergies, Chevron Corporation, and ConocoPhillips are among the largest corporations associated with the fossil fuels lobby.98 The American Petroleum Institute is a powerful industry lobbyist for Big Oil with significant influence in Washington, D.C.99100101 In Australia, Australian Energy Producers, formerly known as the Australian Petroleum Production and Exploration Association (APPEA), has significant influence in Canberra and helps to maintain favorable policy settings for Oil and Gas.102

The presence of major fossil fuel companies and national oil companies at global forums for decision making, like the Intergovernmental Panel on Climate Change,103 Paris Climate Agreement negotiations,104 and United Nations Climate Change conferences has been criticised.105 The lobby is known for exploiting international crises, such as the COVID-19 pandemic,106 or the 2022 Russian invasion of Ukraine,107108 to try to roll back existing regulations or justify new fossil fuel development.109110 Lobbyists try to retain fossil fuel subsidies.111

See also

Notes

Further reading

Wikiquote has quotations related to Fossil fuel.

References

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