Both of them are because they evolved from little tiny creatures millions of years ago
Coal is a fossil fuel. The major fossil fuels are natural gas, crude oil and coal.
fossil
No, time is not a fossil fuel. Fossil fuels are coal, oil and natural gas.
No it isn't a fossil fuel. Fossil fuels include coal and oil.
Coal, methane gas, oil are fossil fuels; uranium is not a fossil fuel.
Fossil fuels (coal, oil and natural gas).
No, it is not. Coal, oil, and natural gas are fossil fuels.
I believe you mean coal bed gas or coal bed methane which is a fossil fuel.
Fossil fuels
oil
coal, oil or gas are all examples of fossil fuels
The fossil fuels are coal, oil and natural gas.