Stock Photo - 04 July 2022, Berlin: Journalists look at parts of the system in the machine hall of the Vattenfall refrigeration plant at the ""topping-out ceremony"" for new high-temperature heat pump. The pump utilizes the surplus waste heat generated in the cooling center there, raises it to a higher temperature level and feeds it into Berlin's city heating network. Photo: Monika Skolimowska/dpa. - Berlin/Berlin/Germany

Stock Photo: 04 July 2022, Berlin: Journalists look at parts of the system in the machine hall of the Vattenfall refrigeration plant at the ""topping-out ceremony"" for new.

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