They are safer for the environment. They are cheaper to develop. They are easier to transport. They produce more energy.
I gave my students this multiple choice question: Many countries depend on the energy from fossil fuels. Some scientists suggest using renewable sources of energy instead. Why would scientists most likely suggest using renewable sources of energy?

Only one answer is correct among these 4 choices:
- They are safer for the environment.
- They are cheaper to develop.
- They are easier to transport.
- They produce more energy.

Could you tell me which one is correct?

They are safer for the environment.