NY Times: Global Warming Reduces Expected Yields of Harvests in Some Countries, Study Says

Published: May 5, 2011

"Global warming is already cutting substantially into potential crop yields in some countries — to such an extent that it may be a factor in the food price increases that have caused worldwide stress in recent years, researchers suggest in a new study... At today’s grain prices, that calculation implies that climate change is costing consumers, food companies and livestock producers about $60 billion a year."

http://www.nytimes.com/2011/05/06/science/earth/06warming.html?ref=science