I would really love to have one of these machines. If I owned a cafe, I'd have one by the door and watch as new greenery began to shoot up around the neighborhood.
The way it works: You buy a seedbomb machine from Common Studio made from a vintage candy machine. They "develop a seed mix as well as a strategic neighborhood intervention plan in response to the unique ecologies of your area." You place the machine in some public place, and they provide the necessary ammunition.