Taiwan has set itself an ambitious goal: wean itself off nuclear power and generate enough electricity from renewable resources to meet 20% of its power needs. The timetable for this goal? 2025. To reach such a difficult target, Taiwan will have to tap into every renewable resource it has. That includes wind and solar energy, or course, but also less visible sources, including one right beneath our feet. Taiwan is a tectonically active land, with plenty of hot springs and even a volcano or two. So what kind of potential does it have to generate geothermal power? There’s hardly a better person to put these kinds of questions to than Professor Song Sheng-Rong of National Taiwan University’s Department of Geosciences. He’s a member of multiple geothermal power organizations, advises on geothermal projects, and is part of an editorial committee for an academic geothermal power journal. And he's here today to talk about how much geothermal power Taiwan can hope to make.