Money: China’s booming economy, a spate of poor harvests across the world and the growing trend to turn food into fuel for our cars are causing millions of people to go hungry. The international price of wheat, maize (corn), soya beans and dozens of other foods has at least doubled in the last two years and in some cases nearly trebled. World grain reserves are at their lowest ebb since 1960, and the US stockpile has not been this low since 1948. The granary is almost …