Chegg: A 'green' alternative to buying college textbooks

Silicon Valley start-up Chegg.com rents textbooks to students for only the time they need them. The books are then returned via UPS free of charge. SmartPlanet correspondent Sumi Das talks to Chegg CEO Dan Rosensweig about the company's sustainable business model, a new brick-and-mortar retail partnership, and its plans for the future