Stock Photo - 16 November 2022, North Rhine-Westphalia, Bochum: Research assistant Stefan Klein works on the control unit of the solar thermal system. The Fraunhofer Institute in Bochum offers workshops under the theme ""Stadtwerke.Nutzen.GEOTHERMIE"". Geothermal energy is an answer to Europe's energy crisis, and North Rhine-Westphalia has good conditions for using geothermal energy. Photo: Fabian Strauch/dpa. - Bochum/North Rhine-Westphalia/Germany

Stock Photo: 16 November 2022, North Rhine-Westphalia, Bochum: Research assistant Stefan Klein works on the control unit of the solar thermal system.

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