From a solar mansion in China to a floating farm in New York, green buildings are sprouting up in cities around the world. Among their many benefits are curbing fossil-fuel use and reducing the urban heat island effect.
Hydroponic Urban Agriculture which can be run on fish waste water from intensive fish farming. This is called aquaponics. The plants clean the water for the fish, the fish water nourishes the plants as it is pumped around the system.