Choose from:
A). hurricanes
B). water pollution
C). volcanos
D). air pollution
Given those answer options, answer the question: Answer the following question given this paragraph: Air pollution may also cause acid rain. This is rain that is more acidic (has a lower pH) than normal rain. Acids form in the atmosphere when nitrogen and sulfur oxides mix with water in air. Nitrogen and sulfur oxides come mainly from motor vehicle exhaust and coal burning. Q: Acid rain may be caused by what? A:
A:
D).