Michael Pollan made his way back to Williams College, just up the road from where he studied, to talk to a room full of people about his book The Omnivore's Dilemma. The talk covers two of the major themes from the book, corn and hope. It is long, but can run behind whatever else you're doing. Pollan is an excellent speaker, personable and interesting, making this time just flow by.
He talks, at the end in answer to a student's question, about the price difference between organic food and industrial food, and how we mis-perceive industrial food being cheaper. As he points out, industrial food has a lower proce per calorie in the store, but only after enormous subsidies along the way. All in all, a fascinating talk from a knowledgeable and interesting speaker.