New report shows perils of air pollution persist nationwide

The American Lung Association's latest State of the Air report concludes that even though Americans have changed their ways significantly over the last 50-plus years, the struggle to provide cleaner air is far from being ...

Pollutant

A pollutant is a waste material that pollutes air, water or soil, and is the cause of pollution.

Three factors determine the severity of a pollutant: its chemical nature, its concentration and its persistence. Some pollutants are biodegradable and therefore will not persist in the environment in the long term. However the degradation products of some pollutants are themselves polluting such as the products DDE and DDD produced from degradation of DDT

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