Never mind the economic crisis. Focus for a moment on a more urgent threat: the great food recession that is sweeping the world faster than the credit crunch. You have probably seen the figures by now: the price of rice has risen by three-quarters over the past year, that of wheat by 130%. There are food crises in 37 countries. One hundred million people, according to the World Bank, could be pushed into deeper poverty by the high prices. But I bet that you have missed the most telling statistic. At 2.1bn tonnes, the global grain harvest broke all records...