Surface of the wall windmill ecological curtain

Japanese shopping malls can be pretty ugly- covering them with this new form of windmill wall certainly help the aesthetics. Nice idea but, as an energy saving solution it is questionable- 775 vertical windmills generate 7,551 kw/hrs of power per year: that's 861 watts per hour. A lot of wall for a few light bulbs! As always, Treehugger is interested in how much energy and resources were consumed to build it and how long the payoff will take. ::via Worldchanging [by Lloyd Alter]