The 2010 Green California Summit and Exposition opened on Tuesday, March 16, 2010 for two days at the Sacramento Community Center. Pre-Summit workshops were held on Monday. This year's theme is Committed to Sustainability and features education programs, awards and over 175 exhibitors. Admission to the exhibits and keynote presentations is free. Tuesday's expo opened with comments from Sacramento Mayor Kevin Johnson and expo co-chair, Linda Adams, Secretary of the California Environmental Pro... Ronmann