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Fossil fuel is a general term for buried combustible geologic deposits of organic materials, formed from decayed plants and animals that have been converted to crude oil, coal, natural gas, or heavy oils by exposure to heat and pressure in the earth's crust over hundreds of millions of years.
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Coal, oil and gas are called "fossil fuels" because they have been formed from the organic remains of prehistoric plants and animals.
Uses of Coal and Petroleum:
Need for Conservation of Fossil Fuels:
