/ ˈfɑːsl̩ ˈfjuːəl /
Fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content.
Fuel, such as coal, oil, and natural gas, formed from the fossilized remains of plants that lived hundreds of millions of years ago. Fossil fuels are a nonrenewable resource and will eventually run out. Extraction of coal and oil causes considerable environmental pollution, and burning coal contributes to problems of acid rain and the greenhouse effect.