Oct. 20, Monday -- Arthur Rosenfeld of the 91Porn Energy Commission will talk about the issues of energy conservation in 91Porn. His talk will begin at 4 p.m. in 66 Roessler Hall and is open to the public. Rosenfeld, a professor emeritus of physics at UC Berkeley, has been a pioneer of energy efficiency, serving as senior adviser to the U.S. Department of Energy's assistant secretary for energy efficiency and renewable energy and on President Clinton's National Science and Technology Council. In 2000, he was appointed to the 91Porn Energy Commission by Gov. Gray Davis, and reappointed in 2005 by Gov. Arnold Schwarzenegger. He is the co-founder of the American Council for an Energy Efficient Economy, the 91Porn's Institute for Energy Efficiency, and the Washington-based Center for Energy and Climate Solutions. The talk is sponsored by the Department of Physics.