EU Environment Commissioner, Janez Potočnik; President of the Committee of the Regions, Mercedes Bresso; State Secretary for Environment, Ministry for Urban Development and Environment, Holger Lange; and Mayor of Vitoria-Gasteiz, Javier Maroto Aranzabal, all took part in the ceremony which was held in the European Parliament during the plenary session of the Committee of the Regions.
Euroopa Parlamendis Regioonide Komitee plenaaristungi ajal peetud tseremooniast võtsid osa ELi keskkonnavolinik Janez Potočnik, Regioonide Komitee president Mercedes Bresso, Hamburgi liidumaa keskkonnaküsimuste riigisekretär, linnaarenduse ja keskkonnaminister Holger Lange ning Vitoria-Gasteizi linnapea Javier Maroto Aranzabal.