Things you can do.

  In the S.E. there are many derelict sites that can be planted with aggressive pioneering nitrogen fixing plants that will rapidly build wild life habitat and help exclude homeless squatters and gangs. Such a site below is common place around here.

We will start discussing the many plants that have already showed to be very promising. So laws cannot be enacted against new plants that may be used in the future for now only North American plants from out west or exotics already established here somewhere will be discussed. Since i have limited.time per post the two we will deal with now are Dalbergia Hupeana and a Albizia fertile hybrid. It is a cross of the established Albizia Julibrizzen, same species from the west of its range (Ankara Turkey) Albizia Kalkora amd Albizia Coreana. No attempt to keep separate as they readily cross when close to each other anyway and the hybridas are much larger and sucker very aggressively. More so than Robinia. Here is one of this years seedlings growing in bare mineral soil.

The second is the Dalbergia also growing in bare mineral soil and an established colony in S. Ga.

The S. Ga colony is growing in sand so poor hardly any weeds will grow in it

 But they do great since they fix their own nitrogen. You can only see two trees as the colony is quite scattered.