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 PNEC – Association of Municipalities Polish Network “Energie Cités” GRAD – Green Roofs for Climate Adaption in Urban Areas Green roofs in the cities as a response to effects of climate change – GRAD final conference A Journey across the Green Roofs of Hamburg