fossil fuel

1. Fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content (synset 114710513)
   is a type of: fuel - a substance that can be consumed to produce energy
   subtypes:

   • coal - fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period
   • gas, natural gas - a fossil fuel in the gaseous state; used for cooking and heating homes
   • crude, crude oil, fossil oil, oil, petroleum, rock oil - a dark oil consisting mainly of hydrocarbons

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