Scientists predict that we have less than 10 years to sufficiently reduce carbon emissions to avert a total environmental disaster. Gary Hirshberg, Stonyfield Farm "CE-Yo", tells of his company's efforts over the past 25 years to reduce its environmental footprint while increasing profits. Hirshberg shares lessons from his book Stirring It Up: How to Make Money and Save the World, in this Stanford Center for Social Innovation audio lecture.