Audio: How Green Was My Organic Milk?

Think you’re saving the environment by buying organic or fueling your car with corn oil? Heather Rogers, author of “Green Gone Wrong, How Our Economy Is Undermining the Environmental Revolution,” says that “green” products aren’t always as environmentally responsible as they appear. In this interview with Need to Know host Alison Stewart, she discusses the reality of organic foods and biofuels, among other things.