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        EPA | Air Quality Index

        This interactive activity adapted from Air Quality Index: A Guide to Air Quality and Your Health by the U.S. EPA examines how data related to pollutants in the air are collected and reported. The AQI, or Air Quality Index, is derived from daily calculations of four major air pollutants regulated by the Clean Air Act.  The activity explains the index values, describes each pollutant and identifies its sources, and details its health effects, including which populations are at greatest risk.

        This media asset was adapted from Air Quality Index: A Guide to Air Quality and Your Health by the U.S. Environmental Protection Agency.

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