Practice!

Sample Problem

Acid rain is created when rainwater picks up ___ in the air.

(A) CO2 emissions

(B) nitrogen pollutants

(C) sulfur pollutants

(D) phosphorus pollutants

Solution

(B) and (C) are correct. Nitrogen and sulfur pollutants are emitted by industrial processes and turn into nitric, nitrous, sulfurous, and sulfuric acids in the rain.