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By 2015, more than 190 million tons of nitrogen will be needed to supply the world's food.


Aerial photo of farmland.

By 2015, more than 190 million tons of nitrogen will be needed to supply the world's food. U.S and U.K. researchers are looking for alternate ways to meet the demand.

Credit: Thinkstock

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Related story: US and UK scientists collaborate to design crops of the future

 



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