Urban farmers in New York, Oakland, and elsewhere are raising fruits and vegetables in cities. They use vacant lots, backyards, and anywhere else they can find space. Most of it appears to be organically grown. The practice has grown from growing a few vegetables for a family's own consumption to selling the stuff in local markets. Most of these urban farmers make little money doing it, and many don't do it for the money, but some make 6 figures.
Man is a creative and adaptive species!