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.
coal
Fossil fuels
wind is a renewable energy source ,while fossil fuels are nonrenewable .
Fossil fuels
they do but it can hurt the enviorment
The SUN!
Coal is a source of energy but i dontknow about all of them.
A non-renewable source of energy.