krafla geothermal power station, iceland

500 1974 1977 1996 activity annually began boreholes capacity company completed construction dependancy drilling earth electricity endless energy exploitation field fire generator geothermal gigawatt government heat heating hours how ice iceland icelandic independent installed interrupted know krafla lake landvirksjun largest megawatt national natural nature pipeline pipelines plant power powerplant production renewable resources second station steam supply sustainable turbine utility valley volcanic volcano wind