Free forever Non-polluting Non-renewable A protection against global warming
The sun The moon Plants Animals
Renewable Non-renewable Free Causing global warming
The carbon dioxide it produces contributes to global warming The carbon dioxide it produces makes a hole in the ozone layer Large amounts of fuel are needed to produce relatively small amounts of energy It produces highly radioactive toxic waste
Renewable Non-renewable Reliable Generating more electricity than fossil fuels
The sun The moon The tides Respiration
Produces dangerous amounts of hydrogen Produces acid rain Does not cause pollution Is used by everyone because it is safe