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Indoor
Pollutants:
Air
Pollutants
from:
© SLAC
Any substance in the air which could, if in high enough concentration, harm
humans, other animals, vegetation, or material is an air pollutant. Pollutants may include
almost any natural or artificial composition of matter capable of being
airborne, and the pollutants 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
The U.S. Environmental Protection Agency or EPA has set national air quality
standards for these six common, criteria pollutants: ozone, particulate
matter, carbon monoxide, nitrogen dioxide, sulfur dioxide, and lead.
Click on the pollutant names below for detailed information about each
unhealthy pollutant.
1. Ozone
2. Particulate Matter
3. Carbon Monoxide
4. Nitrogen Dioxide
5. Sulfur Dioxide
6. Lead
Air Pollutants Reference:
EPA
Urban Air.
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