With food riots on three continents recently, and unprededented competition for food due to population growth and changing diets, there is a looming problem. George joins a Masai chief among the skeletons of cattle he has lost to climate change, and the English farmer who tells him why food production in the UK is also hit. He investigates what is wrong with people's diets and talks to top nutritionist Susan Jebb, DEFRA minister Hilary Benn and Nobel laureate Rajendra Pachauri to uncover what the future holds for our food.