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The Hannover Principles are a self-described living document about building and object design, originally formulated in 1992 by William McDonough and Michael Braungart while planning Expo 2000 (held in Hannover, Germany).

About Expo 2000

Expo 2000 was a World's Fair, held from June 1 to October 31, 2000, which despite 10 years of planning was not financially successful. While previous World's Fairs had typically focused on the cutting edge of technology, Expo 2000 focused more on presenting possible solutions for the future. Only about 25 million of the expected 40 million visitors came to the Expo, which was never fully developed, in part because of the last-minute decision of the United States to participate after originally declining. The Expo's theme and focus was never fully articulated: corporate ...

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