Oil, because it is found underground. Wind, because it is always available. Water, because it is becoming scarce. Coal, because it was formed from plants.
I gave my students this multiple choice question: Which statement identifies an energy source as renewable?

Only one answer is correct among these 4 choices:
- Oil, because it is found underground.
- Wind, because it is always available.
- Water, because it is becoming scarce.
- Coal, because it was formed from plants.

Could you tell me which one is correct?

Wind, because it is always available.