European Roundtable on Climate Change and Sustainable Transition (ERCST) Climate Action Network France Free and Hanseatic City of Hamburg – Ministry of Environment and Energy; General Directorate of Nature Conservation, Landscape Architecture & Energy Division; NGE1 Landscape Planning and Urban Green Institute for Climate Protection, Energy and Mobility (IKEM) négaWatt Energy Cities (ENC) Climate Alliance (CA) Lithuanian Energy Institute International Journalists’ Programmes University of Cambridge Institute for Sustainability Leadership (CISL)