Food security wanes as world warms

Global warming may have begun outpacing ability of farmers to adapt

By Janet Raloff, 17:18 PM December 1, 2010

Since summer, signs of severe food insecurity — droughts, food riots, five- to tenfold increases in produce costs — have erupted around the globe. Several new reports now argue that regionally catastrophic crop failures — largely due to heat stress — are signals that global warming may have begun outpacing the ability of farmers to adapt.

Some one billion people already suffer serious malnutrition. That number could mushroom, the new reports argue, if governments big and small don’t begin ...

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