Portable Greenhouses

(Originally posted by DrewHendricks on Olyblog.)

Trellis and tube structures, very much like clear plastic tented greenhouses on wheels, parked on vacant lots downtown and turning sunlight, CO2 and water into Oxygen, food, and soil. They're mobile, so when the vacant lot needs to be used for something else, you can push them along to their new home. There is always some spare land around, Capital is terribly inefficient with land. You don't have to own land to make it produce, and you don't have to grow plants in soil either - hydroponics work.