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Iin this March 7, 2006 file photo farmers ride bullock carts loaded with sugar cane into the Simbhaoli Integrated Sugar Complex which houses the ethanol plant at Simbhaoli, Uttar Pradesh, India. World food production must rise by 50 percent by 2030 to meet increasing demand, U.N. chief Ban Ki-moon told world leaders Tuesday, June 3, 2008 at a summit grappling with hunger and civil unrest caused by food price hikes. The Rome-based U.N. Food and Agriculture Organization is hosting the three-day summit to try to solve the short-term emergency of increased hunger caused by soaring prices and to help poor countries grow enough food to feed their own. (KEYSTONE/AP Photo/Mustafa Quraishi)