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en.wikipedia.org/wiki/Fossil_fuel

According to U.S. Scientist Jerry Mahlman and USA Today: Mahlman, who crafted the IPCC language used to define levels of scientific certainty, says the new report will lay the blame at the feet of fossil fuels with "virtual certainty," meaning 99% sure. That's a significant jump from "likely," or 66% sure, in the group's last ...

www.dictionary.com/browse/fossil-fuel

Fossil fuel definition, any combustible organic material, as oil, coal, or natural gas , derived from the remains of former life. See more.

www.merriam-webster.com/dictionary/fossil%20fuel

Define fossil fuel: a fuel (such as coal, oil, or natural gas) formed in the earth from plant or animal remains — fossil fuel in a sentence.

www.collinsdictionary.com/us/dictionary/english/fossil-fuel

Fossil fuel definition: Fossil fuel is fuel such as coal or oil that is formed from the decayed remains of plants... | Meaning, pronunciation, translations and examples .

dictionary.cambridge.org/us/dictionary/english/fossil-fuel

fossil fuel definition, meaning, what is fossil fuel: fuels, such as gas, coal, and oil, that were formed underground from plant and animal…. Learn more.

study.com/academy/lesson/what-are-fossil-fuels-definition-advantages-disadvantages.html

Fossil fuels are sources of energy that have developed within the earth over millions of years. Because fossil fuels - oil, natural gas, and coal -...

www.sciencedaily.com/terms/fossil_fuel.htm

Fossil fuels are hydrocarbons, primarily coal, fuel oil or natural gas, formed from the remains of dead plants and animals. In common dialogue, the term fossil fuel also includes hydrocarbon-containing natural resources that are not derived from animal or plant sources. These are sometimes known instead as mineral fuels.

energy.gov/science-innovation/energy-sources/fossil

Fossil energy sources, including oil, coal and natural gas, are non-renewable resources that formed when prehistoric plants and animals died and were gradually buried by layers of rock. Over millions of years, different types of fossil fuels formed -- depending on what combination of organic matter was present, how long it ...

www.britannica.com/science/fossil-fuel

Fossil fuels include coal, petroleum, natural gas, oil shales, bitumens, tar sands, and heavy oils. All contain carbon and were formed as a result of geologic processes acting on the remains of organic matter produced by photosynthesis, a process that began in the Archean Eon (4.0 billion to 2.5 billion years ago).