Tensions rise as global food prices soar

Food prices are soaring, a wealthier Asia is demanding better food and farmers can't keep up. In short, the world faces a food crisis and in some places it is already boiling over.

Around the globe, people are protesting and governments are responding with often counterproductive controls on prices and exports - a new politics of scarcity in which ensuring food supplies is becoming a major challenge for the 21st century.

The world's wheat stocks are at 30-year lows.