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Air
Pollutants
from:
© SLAC
Any substance in air which could, if in high enough concentration, harm
humans, other animals, vegetation, or material. Pollutants may include
almost any natural or artificial composition of matter capable of being
airborne. They may be in the form of solid particles, liquid droplets,
gases, or in combinations of these forms. Generally, they fall into two
main groups:
1) those emitted directly from identifiable sources and
2) those produced in the air by interaction between two or more primary
pollutants, or by reaction with normal atmospheric constituents, with or
without photo activation.
Exclusive of pollen, fog, and dust, which are of natural origin, about
100 contaminants have been identified and fall into the following
categories: solids, sulfur compounds, volatile organic chemicals, nitrogen
compounds, oxygen compounds, halogen compounds, radioactive compounds, and
odors.
Reference:
Information Sphere.
Six Common Air Pollutants
"EPA has set national air quality
standards for six common pollutants (also referred to as "criteria"
pollutants)." The six common pollutants are the following:
1. Ozone
2. Particulate Matter
3. Carbon Monoxide
4. Nitrogen Dioxide
5. Sulfur Dioxide
6. Lead
Air Pollutants Reference:
EPA
Urban Air. |
