National Public Radio: President-elect Barack Obama recently chose Nobel-prize winning physicist Steven Chu to be his energy secretary. Director of the Dept. of Energy’s Lawrence Berkeley National Laboratory, Chu is an advocate of renewable energy research and finding scientific solutions to climate change. Chris Joyce spoke with Chu in October 2007. Here are some excerpts from that conversation. On Reducing Energy Consumption I am actually optimistic — I will be dead before this will be true …