More food, low pollution effort gains traction

Nitrogen fertilizers make it possible to feed more people in the world than ever before. However, too much of it can also harm the environment. Professor Eric Davidson, director of the University of Maryland Center for Environmental Science's Appalachian Laboratory, has been leading a group of scientists, economists, social scientists, and agriculture experts in figuring out how to produce more food while lowering pollution at the same time. He calls it a "Mo Fo Lo Po": more food, low pollution.

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