Because they are remains of organisms preserved in rocks
Because coal and petroleum are themselves fossil fuels.
Fossil fuels are: coal methane, petroleum.
Oil, Coal, and Petroleum
Fossil fuel. Also, natural gas is in the category of fossil fuels.
Petroleum, coal, and natural gas are a few types of fossil fuels
Peat, Coal and Petroleum
I believe the term "fossil fuels" is used for things that burn, in a chemical reaction - like coal and petroleum. Also, "fossil fuels" implies that the fuel is the remainder of fossils - as is believed to be the case with petroleum and coal.I believe the term "fossil fuels" is used for things that burn, in a chemical reaction - like coal and petroleum. Also, "fossil fuels" implies that the fuel is the remainder of fossils - as is believed to be the case with petroleum and coal.I believe the term "fossil fuels" is used for things that burn, in a chemical reaction - like coal and petroleum. Also, "fossil fuels" implies that the fuel is the remainder of fossils - as is believed to be the case with petroleum and coal.I believe the term "fossil fuels" is used for things that burn, in a chemical reaction - like coal and petroleum. Also, "fossil fuels" implies that the fuel is the remainder of fossils - as is believed to be the case with petroleum and coal.
Fossil fuels.
. Fossil fuels(such as coal, petroleum, and natural gas
The known fossil fuels are coal, petroleum, natural gas, lignite, bitumen and peat
Non-renewable fossil fuels are: * coal * crude oil (Petroleum) * natural gas
petroleum and natural gas