FILE PHOTO: An employee of Vulcan Energy Resources works on a sample of geothermal water in Eggenstein near Karlsruhe, Germany, April 23, 2021. REUTERS/Ralph Orlowski/File Photo
FILE PHOTO: An employee of Vulcan Energy Resources works on a sample of geothermal water in Eggenstein near Karlsruhe, Germany, April 23, 2021. REUTERS/Ralph Orlowski/File Photo