Counties in the US that are designated "nonattainment" for air pollution standards are located
A) in the industrial areas of the Midwest.
B) only in states with high urban populations.
C) exclusively along coastlines of both oceans.
D) predominantly in California and the East Coast.
E) in states bordering Canada, but not states bordering Mexico.

Question

Quizplus · Accepted Answer

California and the East Coast have several areas that struggle to meet air quality standards due to high population density, industrial activity, and vehicle emissions.

Counties in the US That Are Designated "Nonattainment" for Air