Key U.N. agencies are warning surging prices could spark a repeat of the food crisis that swept the globe in 2007 and 2008. In a joint appeal, the Food and Agriculture Organization of the United Nations, the International Fund for Agricultural Development and the World Food Program say the world faces a “catastrophe affecting tens of millions” unless food prices can be brought under control. The appeal advises: “Two interconnected problems must be tackled: The immediate issue of some high food prices … and the long-term issue of how we produce, trade and consume food in an age of increasing population, demand and climate change.”