using too much fertilizer in agriculture cutting down large areas of tropical forests burning fossil fuels such as coal and gasoline using chemicals that destroy ozone in the stratosphere
I gave my students this multiple choice question: Which human activity contributes to the formation of acid rain?

Only one answer is correct among these 4 choices:
- using too much fertilizer in agriculture
- cutting down large areas of tropical forests
- burning fossil fuels such as coal and gasoline
- using chemicals that destroy ozone in the stratosphere

Could you tell me which one is correct?

burning fossil fuels such as coal and gasoline