Phosphorus shortage could affect worldwide crop yields

While phosphorus is an essential element for plant metabolism and growth, its future supply under elevated levels of atmospheric carbon dioxide is uncertain. A shortage of this important nutrient could lead to lower crop ...

Swiss native fish in troubled waters

More than half of Switzerland's native fish species are threatened with extinction or are already extinct within the country's waters, a new assessment showed Wednesday.

Air pollution linked with blood pressure in London teens

In a new analysis involving adolescents living in London, exposure to higher levels of the pollutant nitrogen dioxide was associated with lower systolic blood pressure, while exposure to higher levels of particulate matter ...

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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