EXCERPT: 'The Omnivore's Dilemma'

Journalist Michael Pollan, who has unearthed new details of where our food comes from, has written "The Omnivore's Dilemma: The Secrets Behind What You Eat." In the book, Pollan urges young people to weigh the personal and worldwide health consequences of what they choose to eat. Photos, graphs and other visuals help illustrate his point: All of us must take control of our dietary habits. Read the excerpt below, and then head to the "GMA" Library to find more good reads. INTRODUCTION...Full Story