Expert discusses the global carbon budget

The Global Carbon Project recently released its 2019 annual report, giving decision-makers access to data on atmospheric carbon concentrations, emissions and trends. Illinois atmospheric scientist Atul Jain is among the many ...

Self-healing liquid brings new life to battery alternative

Rechargeable lithium-ion (Li-ion) batteries are a revolutionary technology, found in everything from cellphones to cars. Their ubiquity and role in breaking dependence on fossil fuels earned a trio of researchers this year's ...

Opinion: Earth's climate needs our courage

Every year, the Global Carbon Project analyses the global sources and sinks of CO2 and their trends. The latest figures, as well as those from the UNEP emission gap report published last week, are disconcerting: global CO2 ...

Global carbon emissions increase but rate has slowed

Global carbon emissions are set to grow more slowly in 2019, with a decline in coal burning offset by strong growth in natural gas and oil use worldwide—according to researchers at the University of East Anglia (UEA), University ...

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Fossil fuel

Fossil fuels or mineral fuels are fuels formed by natural resources such as anaerobic decomposition of buried dead organisms. The age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years. These fuels contain high percentage of carbon and hydrocarbons.

Fossil fuels range from volatile materials with low carbon:hydrogen ratios like methane, to liquid petroleum to nonvolatile materials composed of almost pure carbon, like anthracite coal. Methane can be found in hydrocarbon fields, alone, associated with oil, or in the form of methane clathrates. It is generally accepted that they formed from the fossilized remains of dead plants and animals by exposure to heat and pressure in the Earth's crust over hundreds of millions of years. This biogenic theory was first introduced by Georg Agricola in 1556 and later by Mikhail Lomonosov in the 18th century.

It was estimated by the Energy Information Administration that in 2006 primary sources of energy consisted of petroleum 36.8%, coal 26.6%, natural gas 22.9%, amounting to an 86% share for fossil fuels in primary energy production in the world. Non-fossil sources included hydroelectric 6.3%, nuclear 6.0%, and (geothermal, solar, tide, wind, wood, waste) amounting 0.9 percent. World energy consumption was growing about 2.3% per year.

Fossil fuels are non-renewable resources because they take millions of years to form, and reserves are being depleted much faster than new ones are being formed. The production and use of fossil fuels raise environmental concerns. A global movement toward the generation of renewable energy is therefore under way to help meet increased energy needs.[citation needed]

The burning of fossil fuels produces around 21.3 billion tonnes (21.3 gigatonnes) of carbon dioxide per year, but it is estimated that natural processes can only absorb about half of that amount, so there is a net increase of 10.65 billion tonnes of atmospheric carbon dioxide per year (one tonne of atmospheric carbon is equivalent to 44/12 or 3.7 tonnes of carbon). Carbon dioxide is one of the greenhouse gases that enhances radiative forcing and contributes to global warming, causing the average surface temperature of the Earth to rise in response, which climate scientists agree will cause major adverse effects.

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