The historic California Academy of Sciences in San Francisco has re-opened for business and is being called the greenest museum in the world. Correspondent Sumi Das talks to Aaron Pope, the manager of sustainability programs at the Academy about the energy efficient technologies theyre using to reduce costs including a solar installation and a natural ventilation system. He also discusses how the museum is marketing its green innovations to attract more visitors. The strategy is working, the museum is averaging 43,000 visitors a week, which is 60 percent better than initial projections.