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Stanford scientists help shed light on key component of China's pollution problem
Date:2/26/2013

ly increased nitrogen deposition," the study's authors write.

Researchers found highly significant increases in bulk nitrogen deposition since the 1980s in China's industrialized North, Southeast and Southwest. Nitrogen levels on the North China Plain are much higher than those observed in any region in the United States and are comparable to the maximum values observed in the United Kingdom and the Netherlands when nitrogen deposition was at its peak in the 1980s.

China's rapid industrialization and agricultural expansion have led to continuous increases in nitrogen emissions and nitrogen deposition. China's production and use of nitrogen-based fertilizers is greater than that of the United States and the European Union combined. Because of inefficiencies, more than half of that fertilizer is lost to the environment in gaseous or dissolved forms.

China's nitrogen deposition problem could be brought under control, the study's authors state, if the country's environmental policy focused on improving efficiency in agricultural use of nitrogen and reducing nitrogen emissions from all sources, including industry and transit.


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Contact: Peter Vitousek
vitousek@stanford.edu
650-725-1866
Stanford University
Source:Eurekalert

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