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Nature 433, 791 (24 February 2005) | doi:10.1038/433791a; Published online 23 February 2005

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Nitrogen study fertilizes fears of pollution

Jim Giles

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UK field project highlights problems of excess nitrogen.

Urgent political and scientific action is needed to tackle the global threat of nitrogen pollution, say scientists behind one of the field's biggest research projects.They gathered in London last week to mark the completion of a five-year, £7-million (US$13-million) project to map the effects of excess nitrogen on forests, rivers and grasslands, primarily in Britain.