Via Inhabitat:
The Water-Scraper [is] a futuristic self-sufficient floating city. A special mention in this year’s eVolo Skyscraper Competition, the design expands the concept of a floating island into a full-fledged underwater skyscraper that harvests renewable energy and grows its own food.
Touted as a self-sufficent floating city, Sarly Adre Bin Sarkum’s Water-Scraper utilizes a variety of green technologies. It generates its own electricity using wave, wind, and solar power and it produces its own food through farming, aquaculture, and hydroponic techniques. The surface of the submerged skyscraper sustains a small forest, while the lower levels contain spaces for its inhabitants to live and work. The building is kept upright using a system of ballasts aided by a set of squid-like tentacles that generate kinetic energy.
Link with many more pictures.

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