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Habitat 67, an experiment in apartment living, became the permanent symbol of Expo 67 after it closed. It was Canadian architect Moshe Safdie's experiment to make a fundamentally better and cheaper housing for the masses. He attempted to make a revolution in the way homes were built - by the industrialization of the building process; essentially factory mass production. He felt that it was more efficient to make buildings in factories and deliver them prefabricated to the site.
http://static.iftk.com.br/mt/2007/02/what_did_the_architect_smoke.html