Green tech: What's changed?

At a Churchill Club event in Menlo Park, Calif., Ira Ehrenpreis of Technology Partners moderates a discussion with executives about new developments in energy efficient materials over the last 15 years. The panelists are Mike Biddle, CEO at MBA Polymers; Jennifer Fonstad, managing director at Draper Fisher Jurvetson; Dirk Michels, partner at K&L Gates; and John Woolard, CEO of BrightSource Energy.