Outdoor air pollution is reduced when ____.
A) buildings slow wind speed and reduce dilution of pollutants
B) hills and mountains reduce the flow of air in valleys
C) high temperatures promote formation of photochemical smog
D) chemical reactions form acid precipitation which falls out of the atmosphere
E) temperature inversions form over cities surrounded by mountains

Question

Quizplus · Accepted Answer

Acid precipitation results from chemical reactions in the atmosphere that transform pollutants into acidic substances. These substances then fall out of the atmosphere as precipitation (rain, snow, etc.), effectively removing those pollutants from the air and thus reducing outdoor air pollution.

Outdoor Air Pollution Is Reduced When ____