ozone erosion acid rain nutrient runoff
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Sulfur scrubbers are devices installed in coal-fired power plants. Sulfur scrubbers reduce the emission of sulfur dioxide. What environmental problem are sulfur scrubbers most likely trying to address?
Possibilities:
- ozone
- erosion
- acid rain
- nutrient runoff

acid rain