Air pollutants which affect environmental conditions.

Any substance in the air which could, if present in high enough concentration, harm humans, animals, vegetation or materials. Substances include GASES; PARTICULATE MATTER; and volatile ORGANIC CHEMICALS.

Synonyms: Pollutants, Air, 0, Pollutant, Air, Air Pollutants, Environmental, Environmental Pollutants, Air, Environmental Air Pollutants, Pollutants, Air Environmental, Air Pollutants, Pollutants, Environmental Air, Air Environmental Pollutants, Air Pollutant