Thank you very much @tygertyger.

Interesting fact about the crime rate...I didnt know that, but now that you mention it, it does make absolute sense.
It almost like those gardens create a value for the neighborhoods way beyond what they actually worth, it provides a value of community, of neighborliness and as a result -> a more peaceful neighborhoods with less crime!

And that just that basic impact, on top of this they get to learn practical tools and skills, they get to grow their food and the most important part everybody get to feel part of something, a certain ownership of something unique...and that really helps taking care of the whole thing, organizing volunteers etc...

Thanks for taking the time to comment, I appreciate it.