http://video.nytimes.com/video/2010/09/25/business/energy-environment/1248069086506/passive-house.html
Hier können sie die ganze Story lesen.
http://www.nytimes.com/2010/09/26/business/energy-environment/26smart.html?ex=1303185600&en=fe5e71fd953a95c1&ei=5087&WT.mc_id=BU-D-I-NYT-MOD-MOD-M172d-ROS-1010-HDR&WT.mc_ev=click
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