47+ Fossil Fuel Oil Natural Gas US. Fossil fuels are made from decomposing plants and animals. Coal, crude oil, and natural gas are all considered fossil fuels because they were formed from the fossilized, buried remains of plants and animals that lived millions of years ago.
Fossil fuels are essentially the remains of plants of animals.
But fossil fuels come with a cost. Oil is a thick, black, gooey liquid also called petroleum. Oil and gas are hydrocarbons (molecules that have only hydrogen and carbon in them). Coal , oil , and natural gas are examples of fossil fuels.