this is the second solution.

to create balance and a sense of realism, some of the other brownfields can be turned into mini bio-spheres which would grow tropical plants,fruits and vegetables. this is a combination of the idea of arizona's bio-sphere and the philadelphai zoo's tropical birdhouse.

these bio-spheres would serve two purposes.

first, the tropical plants could be used by the allopathic and homeopathic health communities for medicine.alot of these plants are endangered due to the cutting down of our amazon rainforsts. second, the fruits and vegetables can be used to feed the poor and starving.

these biospheres could also be used for people to take tours and work in them,creating a sense of community.