Stock Photo - 16 August 2021, North Rhine-Westphalia, Wuppertal: DGB Chairman Reiner Hoffmann takes a photo of a display panel showing the CO2 savings, The trade union official visits the waste-to-energy plant as part of a summer trip. Hydrogen is produced there in the project ""H2W - Hydrogen for Wuppertal"". Since 2020, fuel cell buses of the Wuppertal public utility company have been refuelled at a hydrogen filling station. Photo: Christopher Neundorf/dpa. - Wuppertal/North Rhine-Westphalia/Germany

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