Geothermal Energy

Energy from the Earth's core comes to the surface

Fire and Ice

Geothermal plants 
provide some 25 percent of Iceland's electricityStephen Toner/Getty Images

The Big Picture: Geologically active countries like Iceland can more than meet their needs with the energy that vents from the Earth, but other countries would benefit from expanding clean geothermal power as quickly as possible.

Where We Are Now: 10 GW
What We Need by 2050: 700 GW

For more on Iceland's geothermal bailout--a two-mile well drilled into a volcano--see our feature here.