Author: Source: A&W Magazine

Air Pollution

Particulate matter, or PM, represents a category of pollution describing airborne particles measuring 10 micrograms or smaller. Particulate matter can include, but is not limited to, dust, soot, dirt, smoke, chemicals, bacteria, viruses, and liquid droplets. Since particle pollution has a range of chemical makeups and sources, the level of risk and associated health effects are ascribed to the size of particles rather than their composition.

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