4. Acid rain mainly result from

A. Sulfur dioxide
B. Carbon dioxide
C. Carbon monoxide
D. Ammonia
✅ The correct answer is option A.
Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids. … Nitrogen oxides can also be produced naturally by lightning strikes, and sulfur dioxide is produced by volcanic eruptions.

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