I don`t like to waist your time and so i don`t talk about. how good and why is nature in the city.
My Idea:
Berliner Sparkasse plant appletrees of the old kinds(tasteful and 5 before lost).They do it in public places.
The people in berlin get Oxygen, nature for Viewing and for eating.
B.S. save also a piece of history and the good old taste.
The people should get the option to help to plant. That`s funny and good for teamspirit.