An important step in making cities future-proof and climate-resilient is to increase the amount of nature by implementing more greenery. Grey buildings can easily be turned green by implementing a green wall or a green roof. At Building Green Aarhus, Sempergreen and Jydsk demonstrate the SemperGreenwall, the most flexible living wall system on the market. With its Cradle-to-Cradle certification, the SemperGreenwall fits perfectly within the circular building strategy. The green wall system’s fire safety certificate makes the living wall system applicable for high-rise buildings and escape routes. SemperGreenwalls have already been applied in Danish construction projects, for example, at a car park at a Copenhagen hospital and at a car park in Roskilde. At the fair, Sempergreen will also demonstrate its green roofs systems. Green roofs can make a huge contribution in storm water management during heavy rainfall. Next to that, green roofs are beneficial to the local biodiversity, the reduction of the urban heat island effect, provide sound insulation and  improve the air quality in the city.