Corn's key role as food and fuel

Price of food is on the rise. On the Chicago markets, the price of a bushel of wheat has gone over $10 for the first time. Soybeans are at a 34-year high. And corn is hitting new highs as well. International Monetary Fund says that over the past 12 months, "the world has experienced a substantial inflationary shock in the form of higher food prices".Simon Johnson, chief economist at the IMF, points to three factors as responsible for the spike in prices. First, increased demand from emerging economies like India and China, where consumers are demanding more calories in their diet. Second, weather. Droughts have had an impact in some parts of the world.But third is the contentious relationship between food and fuel... BBC