Question

which of the following is a secondary air pollutant? select one: a. ozone b. sulfur dioxide c. volatile organic compounds (vocs) d. particulate matter

Explanation:

Secondary air pollutants are formed through chemical reactions in the atmosphere from primary pollutants. Ozone is formed when nitrogen oxides and volatile - organic compounds react in the presence of sunlight. Sulfur dioxide, VOCs, and particulate matter are primary pollutants emitted directly into the atmosphere.

Answer:

A. ozone