back to the roots: Afforestation
Sustainability requires ideas and actions regarding many different subject ans aspects of a city and the lives ot the people that live in it. And there are many great ideas how to improve sustainability: roof water collection, public instead of private transportation, new mobility concepts, painting houses light instead of dark to save energy, and so on. While all these activities are great and necessary, my biggest fear in the long run is for water and energy (including the required material to collect and distribute energy). And therefore, my suggestion is to start protecting natural resources as quickly as possible. Only natu...