A fossil fuel is a carbon compound- or hydrocarbon-containing material such as coal, oil, and natural gas, formed naturally in the Earth's crust from the remains of prehistoric organisms animals, plants and planktons a process that occurs within geological formations. Reservoirs of such compound mixtures can be extracted and burned as a fuel for human consumption to provide heat for direct use (such as for cooking or heating), to power heat engines such as steam or internal combustion engines that can propel vehicles, or to generate electricity via steam turbine generators

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