Geothermal power plants in Iceland include Nesjavellir (120 MW), Reykjanes (100 MW), Hellisheiði (303 MW), Krafla (60 MW), and Svartsengi (46.5 MW). The Svartsengi power plant and the Nesjavellir power plant produce both electricity and hot water for heating purposes. The move from oil-based heating to geothermal heating saved Iceland an estimated total of US $8.2 billion from 1970 to 2000 and lowered the release of carbon dioxide emissions by 37%. It would have taken 646,000 tons of oil to heat Iceland's homes in 2003.