But our other demand-driven crisis — food inflation — is simply a curse since there is no pleasant alternative to eating. This problem has a variety of causes: the growth of meat-based diets across the world, requiring large amounts of grain for animal feed; the diversion of acreage to the production of ethanol; the rising cost of food transportation and natural gas-based fertilizers; water shortages and climate disruption. Recent prices have dipped a bit, but expensive food now seems to be a fact of life.