Gardens of Babylon
All hanging gardens.
“Biosphere home farming concept generates food and cooking gas, while filtering water. The concept supplements a families nutritional needs by generating several hundred calories a day in the form of fish, root vegetables, grasses, plants and algae. Unlike conventional hydroponic nurseries this system incorporates a methane digester than produces heat and gas to power lights, similarly algae produces hydrogen and the root plants produces oxygen, which is fed back to fish...