Michael Pollan is one of the nations leading writers and thinkers in this country on the issue of food. He is author of several books about food, including The Botany of Desire, The Omnivores Dilemma and his latest, In Defense of Food: An Eaters Manifesto. In light of what he calls the processed food industry co-option of sustainability and its vast spending on marketing, Pollan advises to be wary of any food that's advertised. 94% of it is spent advertising processed foods.