Fossil fuels will be exhausted within a relatively short time.
Disadvantage
Geothermal heat is available only in a few places in the world.
Disadvantage
If the wind does not blow, there is no wind energy.
Disadvantage
Water power provides energy without pollution.
Advantage
A nuclear reactor releases radiation which is dangerous to the environment.
Disadvantage
Solar energy is not only plentiful and unlimited but also clean and safe.
Advantage
It is expensive to build a dam for hydroelectricity
Disadvantage
Tidal energy is intermittent because the tidal flow is not constant.
Disadvantage
Renewable energy lowers reliance on foreign energy sources.
Advantage
