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US drought may drive up world food prices

9 August 2012 Last updated at 22:52 BST

The ongoing drought in the US which has hit corn and soy growers could drive up food prices worldwide.

July was the hottest month in American history, and with soaring temperatures and a lack of rain across much of the country's agricultural land it has made for difficult conditions for farmers and ranchers.

Mark Mardell reports from southern Illinois, one of the most severely affected areas.