The Sacramento Clean Tech Showcase keynote speaker Daniel Sperling is an internationally-renowned expert on transportation, energy and sustainability issues. In December he co-authored the book Two Billion Cars which projects that within 20 years the number of motor vehicles on the planet will double from its current total of one billion due primarily to growth in India and China. Sperling is a Professor of Engineering and Environmental Science & Policy at the University of California, Davis, and Founding Director of the university's Institute of Transportation Studies. He also serves on the California Air Resources Board, chairs the Future of Mobility Council of the Davos World Economic