Nitrogen emerges as the latest climate-change threat

Dandelion Salad

By Robert S. Boyd
McClatchy Newspapers
09/13/2008

WASHINGTON — Scientists are raising alarms about yet another threat to Earth’s climate and human well-being. This time it’s nitrogen, a common element essential to all life.

For years, people have been bombarded with warnings about the harmful effects of carbon — especially in the form of carbon dioxide (CO2), a greenhouse gas widely blamed for global warming.

Now, it’s becoming clear that human activities, such as driving cars and raising crops, also are boosting nitrogen to dangerous levels — polluting air and water and damaging human health.

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McClatchy Washington Bureau | 09/13/2008 | Nitrogen emerges as the latest climate-change threat.

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