There are some streets that are treeless.
Including the one I live on.
It would be nice if players could modify this situation.
The mechanism?
Not sure.
A few ideas.
a) Permits via Bureau.
b) Petition.
c) Fundraising.
d) A tool -- maybe it's a "Raised Bed." Or a lockable Treepot (ala the gnome).
More ideas welcome.