We all know the benefits provided by green roofs and walls, such as reducing building heating and coo ling requirements among others. However, this project represents a theoretical perspective of the po tential in building's surfaces for greening within the city. It doesn't mean that every roof and facade have to be green, but it shows the capacity that these have, and it gives us a new perspective.

With the tools provided in QGIS, we get the surface areas of the buildings and the land area of the old airport in m2. The results were represented in circles, and after different combinations between pitched-, flat roofs and facades, we can see how much surface area we would need to reach the terrain of the airport or even exceed it.

One finding was that if only the roofs were green, we would regain 75% green area compared to the terrain. In the case of only the faca

des, we would exceed the airport area by 50%. And in the hypothe tical case in which all the buildings were covered with vegetation, we would obtain more than double the green area (approx. 1.48 M m2)

Anyone who has visited this area knows how extensive the terrain is and to think that it would be poss ble to reach it with our already built surrounding is impressive. The next step would be to find out which are the most appropriate buildings and investigate factors like the type of vegetation, the onl entation of the sun and shadows possible blodiversity, etc.