gruensystem.koeln (green system Cologne) emanates from an open letter to the lord mayor of the city of Cologne. The 41 signees represent 170.000 members and supporters and include ICOMOS-IFLA, International Scientific Committee on Cultural Landscapes (ISCCL), Environmental Action Germany (DUH), German Society for Gardening and Landscaping | Working Group Historical Gardens, nature protection organization NABU | North Rhine Westphalia, BUND friends of the earth | North Rhine Westphalia, Rheinischer Verein für Denkmalpflege und Landschaftsschutz e.V. | Regional Association Cologne, the Encke family as descendants of Chief Garden Architect Fritz Encke, Konrad Adenauer for Fortis Colonia and many other associations and campaign groups. Please see: gruensystem.koeln/en.
gruensystem.koeln represents a consensus network and project under the roof of the citizen's initiative 'Gruene Lunge Köln'. It is sustained by leading experts of interdisciplinary fields such as eco(toxico)logy, public health, monument protection as well as horticulture and specifically by the citizens of Cologne.