Clean Air Act saved 1.5 billion birds, study shows

U.S. pollution regulations meant to protect humans from dirty air are also saving birds. So concludes a new continentwide study published today in The Proceedings of the National Academy of Sciences. Study authors found that ...

Covid and pollution: intimately linked, compound threat

Lockdowns may have temporarily cleared up the skies above big cities this year but experts warn that air pollution remains a Covid-19 threat multiplier, as well a health hazard that will far outlast the pandemic.

Which particulate air pollution poses the greatest health risk?

Researchers at the Paul Scherrer Institute (PSI), together with colleagues from several other European institutions, have investigated whether particulate matter from certain sources can be especially harmful to human health. ...

Governments can curb over-fertilization

Many countries could be using less nitrogen fertilizer in their agriculture without compromising their crop yields, as an international research team headed up by ETH scientists David W├╝pper and Robert Finger are demonstrating.

Noise and light alter bird nesting habits and success

Looking for a bird's-eye view of human impact? A new study published in the journal Nature provides the most comprehensive picture yet of how human noise and light pollution affect birds throughout North America, including ...

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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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