At interesting take on grey water reuse and hydroponics - "the vertical wetland".
Vertical algae-powered bioreactor to produce biofuels .Pre fab modules are tended by robotic arms to optimize growing conditions
SKYSCRAPER FARMING | I love the old and traditional, but this is an interesting concept.
Clepsydra Urban Farming plan houses eco friendly features and can be erected alongside any building like a residential tower, school, shopping mall, office, etc. The construction will have 10 storey’s and will produce food equivalent to yields of about 6 acres of farms.
Urban farming utopia in India produces more energy than it uses | Inhabitat - Green Design, Innovation, Architecture, Green Building
Agriculture 2.0 (Vertical Farming) by Edouard Cabay and Appareil