David Chiang, project manager of the Solar Photovoltaic program for Southern California Edison, right, inspects solar panels while touring Pacific Gas and Electric Company's Vaca-Dixon solar energy ... more 
David Chiang, project manager of the Solar Photovoltaic program for Southern California Edison, right, inspects solar panels while touring Pacific Gas and Electric Company's Vaca-Dixon solar energy site with PG&E's Greg Bosscawen, near Vacaville, Calif., Tuesday, April 12, 2011. Gov. Jerry Brown signed legislation, Tuesday, that would require California utilities to get one-third of their power from renewable sources, giving the state the most aggressive alternative energy mandate in the U.S. less 
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Associated Press | Photo By Rich Pedroncelli
Tue, Apr 12, 2011 5:39 PM EDT