The three UN food agencies urged governments to take quick action to curb the rising prices of corn, wheat and soybeans and avoid a repeat of the 2007-2008 food crises. The sharp rise in food prices in recent months could make life even more difficult for tens of millions of people, especially those in poor countries, warn the heads of the UN World Food Program, FAO and International Fund for Agriculture Development. A prolonged drought in the U.S., the top exporter of corn, wheat and soybeans, has helped drive up commodity prices.