Originally trained in theoretical physics, Eric Williams began work on sustainability assessment of technology at the United Nations University in Tokyo. Returning to the U.S. first to Carnegie Mellon and then to Arizona State University, he is now Professor at the Golisano Institute of Sustainability at Rochester Institute of Technology. Much of his prior research dealt with assessing and managing the sustainability of information technology, with emphases on life cycle assessment, material flows and global electronic waste. Eric’s recent research focuses on understanding progress and diffusion of emerging energy technologies, including grid modeling, experience curves and analyzing behavioral trends. He testified before Congress and has served on three National Academy of Science committees. Eric’s research has been widely covered in the media, outlets include the New York Times, the Washington Post and Scientific American.