Rising temperatures between 1981 and 2002 caused a loss in production of wheat, corn and barley that amounted in effect to some 40 million tons a year according to one of the first scientific studies of how climate change has affected cereal crops.
“Most people tend to think of climate change as something that will impact the future, but this study shows that warming over the past two decades has already had real effects on global food supply,” said Christopher Field of the Carnegie Institution in Stanford, California.
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