Biofuels may damage health, researchers find

Concern is growing about finding alternatives to fossil fuels, but the negative impact of one of these—biofuels—may be greater than we first thought, say scientists.

Plant stress paints early picture of drought

In July 2012, farmers in the U.S. Midwest and Plains regions watched crops wilt and die after a stretch of unusually low precipitation and high temperatures. Before a lack of rain and record-breaking heat signaled a problem, ...

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