The Kö-Bogen II, designed by Ingenhoven architects, is the new green centre of Düsseldorf’s city centre. The office and commercial building is planted with over 30,000 hornbeams – an absolute novelty in Europe. The green façade makes an important contribution to improving the microclimate on and in the building: it reduces solar heat gain, stores moisture and reduces ambient noise. In addition, the façade absorbs as much CO2 as 80 large deciduous trees. Florian Starz, team leader at Werner Sobek AG, was responsible for planning the façade. In his interview, he provides insight into the challenges and special features of this beautiful project. Click here for the Video.