Photochemical smog differs from industrial smog in that it _________________
A) has large quantities of soot
B) is formed only in the presence of sunlight
C) is primarily composed of carbon monoxide
D) is an unhealthy mixture of pollutants
E) consists of primary pollutants

Question

Quizplus · Accepted Answer

Photochemical smog is only formed in the presence of sunlight, whereas industrial smog can form in the absence of sunlight.

Photochemical Smog Differs from Industrial Smog in That It _________________