Regulation and reality in reducing global warming

While Donald Trump's functionaries continue to deny the science of climate change, American states are setting ambitious greenhouse gas reduction targets and nations all over the world are struggling to deal with the difficulty ...

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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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