Phoenix, Arizona might be classified as a PSD area with respect to some pollutants, but not with respect to others.

Question

Quizplus · Accepted Answer

PSD (Prevention of Significant Deterioration) areas are classified based on air quality standards for specific pollutants. A location like Phoenix, Arizona, could meet the air quality standards (and thus be classified as a PSD area) for some pollutants, but not for others, depending on local environmental conditions and emissions.

Phoenix, Arizona Might Be Classified as a PSD Area with Respect