Ecosystem services placed on a green roof not only benefit the individual property, but can also benefit the whole society. The green roof, for example absorb storm water which relieves the city’s runoff water system. Large surface green roofs can also reduce the risk of flooding. With the right combination of vegetation, biodiversity can also be promoted and developed in the urban space. Habitats for i.a. insects are essential for many ecosystems. Growing and farming on roofs is something that is developing more and more. The crops are locally grown the transport distances for food and shortened. This gives more people the opportunity to develop local circular systems regarding food supply in combination with local energy supply.