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Liquid or solid particles such as dust, smoke, mist, or smog found in air emissions.

[Greek aer — air and German Sol] — disperse system composed of solid or liquid particles fluidized in a gaseous medium; to A. smokes and mists are referred.

Any substance in air that could, in high enough concentration, harm man, animals, vegetation or material. Pollutants may include almost any natural or artificial composit