How science can help feed the world

We thought wide-scale food shortages were behind us. Just a few years ago, most countries - with the exception of some in Africa - were looking as if they would be capable of adequately feeding their people, and the rich world was trying to figure out what to do with its food mountains. How things have changed. Droughts, high oil prices, changing diets, the rush to grow biofuels and other factors have caused shortages of most of the major food crops. On every continent there is concern over high food prices, and in some places even rioting. (Editorial)