FILE - In this Sept. 11, 2006 file photo, corn grows on a farm near Morrow, Ohio. On our current emissions path, climate change becomes the "threat multiplier" that could double grain prices by 2050 and leave millions more children malnourished, global food experts reported Wednesday Dec. 1, 2010. In one combination of climate models and scenarios, "the corn belt in the United States could actually see a significant reduction in productivity potential," according to senior research fellow Gerald Nelson of the International Food Policy Research Institute (IFPRI). (AP Photo/Al Behrman, File)
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