In recent years, processes of urbanisation have been changing the face of the world as we know it. A whole new landscape is being built, one with many more challenges and externalities than the previous one. Besides the correlation that these intense urbanisation processes have with climate change, more subtly, they relate to a conceptual separation of the natural and built environment: as of today, socio-economic growth cannot be met without environmental degradation, and while many efforts have already been made towards its conservation, none has proved effective on a global and continental scale. A reason behind this ineffectiveness lies in a “weak” understanding of the concept of sustainability, in which environment, society and economy are loosely interchangeable. Furthermore, the current administrative division of territories poses yet another challenge to the management of ecosystems which often have a cross-border nature.