Iceland leads the world in terms of meeting its energy needs with geothermal energy, but the United States actually comes in first in overall capacity. Drawing heat from underground provides dispatchable renewable energy, but finding viable pockets of heat is a challenge and in some instance, geothermal energy can emit greenhouse gases.

Researchers in Iceland have recently confirmed that they can sequester carbon dioxide from geothermal power plants underground by turning it into rock.

Hellisheiði Power Station outside of Reykjavik, Iceland