Wolfgang Kessling: "I firmly believe that, in the future, we need to be even more aware that nature is a finite resource. And I think we greatly underestimate nature’s "eco-services". Ten per cent more well-watered green spaces in cities would probably keep climate change at roughly the present level until 2080, as the urban space would benefit greatly from water evaporation and shading. When we have information like that at our fingertips, we need to use it and design buildings and cities accordingly. We have to respect nature and let it do its job appropriately and effectively."