Underground farm in Japanese office building

An underground rice and vegetable field has been planted beneath an office building in Tokyo's Otemachi business district. This urban farm - in what used to be the vault of a major bank - is maintained using computer-controlled artificial light and temperature management. It was brought into being by a personnel company as a means of providing agricultural training to young people who are having trouble finding employment and middle-aged people in search of a second career.
via: Make

Power Generating Wind Dam

"As part of our ongoing investigation of viable and sustainable solutions to generating alternative power, our heads really turned when we came across this proposal for a power-generating “wind dam” by UK architects Chetwoods Associates."

via Inhabitat

reverse graffitti

Brazilian artist Alexandre Orion turned a São Paulo transport tunnel into a kind of graphic charnel house, lined with skulls.
He created the images, the project's website explains, "by selectively scraping off layers of black soot deposited on those walls in the short life of this orifice of modernity."

via BLDGBLOG

(quite old, i know. but it fits in here perfectly, doesn't it?)