Thursday, June 30th, 2022
Journalist are seen inside a vast thermal tank to store hot water in Berlin, Germany, Thursday, June 30, 2022. Power provider Vattenfall unveiled a new facility in Berlin on Thursday that turns solar and wind energy into heat, which can be stored in a vast thermal tank and released into the German capital's grid as needed, smoothing out the fluctuating supply problem of renewables. (AP Photo/Michael Sohn)