Carbon
Most common in all fossil fuels is carbon. In natural gas, both hydrogen and carbon are common.
Natural gas
Actually you cannot talk about common things in fossil fuel and petroleum.This things at the point that petroleum is a fossil fuel.
No its not a fossil fuel
Oil is a fossil fuel.
Fossil fuel is cheap
Fossil
Sorry, no, wool is not a fossil fuel.
Gasoline is a fossil fuel.
Yes it is a fossil fuel.
Petroleum is one of three most common fossil fuels. Oil Coal Petroleum
gas comes from fossil fuel.
GAS I take it this is an American answering. As a British person, OIL is a liquid fossil fuel, COAL is a solid fossil fuel and NATURAL GAS is a gaseous fossil fuel.