Fertilizers -- a growing threat to sea life

A rise in carbon emissions is not the only threat to the planet. Changes to the nitrogen cycle, caused in large part by the widespread use of fertilizers, are also damaging both water quality and aquatic life. These concerns are highlighted by Professor Grace Brush, from Johns Hopkins University in Baltimore, USA, in her historical review of landscape changes around Chesapeake Bay, a large estuary on the Atlantic coast of the USA. Her findings are published online this week in Springer's journal Estuaries and Coasts.

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