fluorocarbons from aerosol spray cans nitrous oxide from volcanic eruptions sulfur dioxide from burning fossil fuels soil particles from the use of farm equipment
I gave my students this multiple choice question: Acid rain can damage limestone buildings and marble statues. It can also harm organisms living in ponds and other ecosystems. Which pollutant in the atmosphere causes most of the acid rain?

Only one answer is correct among these 4 choices:
- fluorocarbons from aerosol spray cans
- nitrous oxide from volcanic eruptions
- sulfur dioxide from burning fossil fuels
- soil particles from the use of farm equipment

Could you tell me which one is correct?

sulfur dioxide from burning fossil fuels