Water-scraper is a concept piece entered into the eVoIo Skyscraper Competition which shows a future where people live and work underwater. Harnessing wave, wind and solar power to generate electricity, it's a future world I'd be thrilled to live in.

We'd also be able to grow food using aquaculture and hydroponic ways—though if it just tastes like algae I might stick with city-living for a while longer. [Water-scraper via Inhabitat]