Each year, the World Economic Forum honors up to 300 outstanding personalities in business, politics, science and culture as Young Global Leaders. Global 3000 interviews some of this year’s innovators, movers and shakers.   Leslie Maasdorp, a financial expert from the British-owned Barclays Capital in South Africa, characterizes the food crisis as one of the biggest global challenges of all time. Christophe Beck worked for more than 10 years for food company Nestlé.