Comet ATLAS may put on quite a show

A comet called Atlas is currently heading toward the sun, and it just might put on a really good show in a couple of months. Discovered last December by the Asteroid Terrestrial-impact Last Alert system in Hawaii (thus the ...

Pilot whale meat poses health hazard, Faroese warned

The Faroe Islands' ritual pilot whale hunt is not only highly controversial, eating the whale meat also poses a health hazard, public health authorities in Denmark's autonomous North Atlantic territory warn, advising against ...

Grasslands more reliable carbon sink than trees

Forests have long served as a critical carbon sink, consuming about a quarter of the carbon dioxide pollution produced by humans worldwide. But decades of fire suppression, warming temperatures and drought have increased ...

About 3% of Starlink satellites have failed so far

SpaceX has drawn plenty of praise and criticism with the creation of Starlink, a constellation that will one day provide broadband internet access to the entire world. To date, the company has launched over 800 satellites ...

Diesel is now better than gas, study says

Modern diesel cars emit less pollution generally than cars that run on gasoline, says a new six-nation study published today in Scientific Reports whose groundwork was laid in part by an American chemist now working at Université ...

Study finds pollution is deadlier than war, disaster, hunger

Environmental pollution—from filthy air to contaminated water—is killing more people every year than all war and violence in the world. More than smoking, hunger or natural disasters. More than AIDS, tuberculosis and ...

Noise created by humans is pervasive in US protected areas

Protected areas in the United States, representing 14 percent of the land mass, provide places for respite, recreation, and natural resource conservation. However, noise pollution poses novel threats to these protected areas, ...

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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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