ARPA-E Energy Innovation Summit 2011, Washington,DC

Former U.S. Secretary of Energy Steven Chu, right, and Arun Majumdar, former director of the Department of Energy’s Advanced Research Projects Agency-Energy, tour the agency’s Energy Innovation Summit in 2011. Now both members of the Stanford faculty, Chu and Majumdar are two of 11 experts interviewed for a new analysis of how the next boom in cleantech investments can be more productive than the first one.