An Israeli designer, Izhar Gafni, has designed a bicycle made of cardboard, based on the origami principle that folds multiply strength. There's a video at the end the the article that depicts his process:
http://www.salon.com/2012/09/18/pape...rce=newsletter
As the author points out, were this to be able to be mass-produced, the transport possibilities in developing countries could be huge.


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