After the 1973 oil crisis , the energy politics were determined to become less dependent on the import of petroleum . Since then , electricity has been generated mostly from hydropower and nuclear power . Sweden wants to be independent of petroleum use by 2020 . The Three Mile Island accident ( United States ) prompted the Swedish parliament in 1980 after a referendum to decide that no further nuclear power plants should be built and that a nuclear power phase-out should be completed by 2010 . , the use of renewables amounted to 26 % of the energy supply in Sweden , most important being hydropower and biomass . In 2003 , electricity from hydropower accounted for 53 TWh and 40 % of the country 's production of electricity with nuclear power delivering 65 TWh ( 49 % ) . At the same time , the use of biofuels , peat etc. produced 13 TWh of electricity . Sweden is the highest ranked country in the Climate Change Performance Index
Three Mile Island accident
Three Mile Island accident
Politics of Sweden