Tree houses: are wooden skyscrapers the future of tall buildings? | Science | The Guardian

http://www.theguardian.com/artanddesign/2015/jul/07/tree-houses-are-wooden-skyscrapers-the-future-of-tall-buildings

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First saved: 2015-Jul-11 (Sat)
Last checked: 2015-Oct-27 (Tue), response 200