In common with other forms of direct electric heating, storage heaters are not necessarily environmentally friendly because the source of electricity may be generated using fossil fuels, with up to two-thirds of energy in the fuel lost at the power station and in transmission losses. In Sweden the use of direct electric heating has been restricted since the 1980s for this reason, and there are plans to phase it out entirely—see Oil phase-out in Sweden—while Denmark and Germany have banned the installation of electric space heating in new buildings for similar reasons (though in Germany the ban was lifted in 2013).