AdvertisementFull Steam Ahead For California Geothermal Plans?August 19, 2010Craig MillerfacebookEmailRenewable energy advocates are looking to geothermal sources like this plant in Calipatria, Calif., to provide electricity to help California meet its goal of generating 33 percent of its power from renewable sources by 2020. But some conventional geothermal sites are, quite literally, running out of steam. (Getty Images)