Which one of the following groups represents secondary air pollutants?
A. Ozone, Formaldehyde, Peroxy-acetyl-nitrate, and Halogen compounds
B. Formaldehyde, Hydrocarbon, Ozone and Photochemical smog
C. Ozone, Acid mist, Formaldehyde and Photochemical smog
D. Formaldehyde, Acid mists, Hydrocarbon and Photochemical smog
Answer:C
Which one of the following groups represents secondary air pollutants?
A. Ozone, Formaldehyde, Peroxy-acetyl-nitrate, and Halogen compounds B. Formaldehyde, Hydrocarbon, Ozone and Photochemical smog C. Ozone, Acid mist, Formaldehyde and Photochemical smog D. Formaldehyde, Acid mists, Hydrocarbon and Photochemical smog