Because it cant be used again once it's first used
fossil fuels can be used as an energy source to power all vehicles and most machinery
Fossil fuels are exhaustible. Electric energy is an alternative.
Fossil fuels.
Fossil fuels are a non-renewable energy source.
fossil fuels
coal
Fossil fuels
wind is a renewable energy source ,while fossil fuels are nonrenewable .
they do but it can hurt the enviorment
The SUN!
Fossil fuels
Coal is a source of energy but i dontknow about all of them.