On this edition of StudioTulsa, we speak with Philip Howard, a professor of community sustainability at Michigan State University. He's also president of the Agriculture, Food, and Human Values Society, and is a member of the International Panel of Experts on Sustainable Food Systems. His new book, released earlier this year, is "Concentration and Power in the Food System: Who Controls What We Eat?" -- and, working from ideas set forth in this book, he'll give a free-to-the-public address here