the equipment for harnessing wind is inexpensive wind produces less pollution than fossil fuels energy from wind power is easy to store wind is more efficient than fossil fuels
I gave my students this multiple choice question: Which is the most likely reason that using energy generated from wind is better for air quality than burning fossil fuels?

Only one answer is correct among these 4 choices:
- the equipment for harnessing wind is inexpensive
- wind produces less pollution than fossil fuels
- energy from wind power is easy to store
- wind is more efficient than fossil fuels

Could you tell me which one is correct?

wind produces less pollution than fossil fuels