When it comes to alternative energy, most people think of solar or wind. But the hills just north of Sonoma wine country are a world leader in another kind of clean power, and under an ambitious new project, they are about to produce even more.
You may listen to the "Geothermal Heats up" radio report online, as well as find additional links and resources. Also see additional photos for this radio report.
Amy Standen is a Reporter for QUEST and Radio News at KQED-FM.