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- Semi-Finalists for the 2012 Buckminster Fuller Challenge Announced! Thu, 22 Mar 12, 11:51pmRead the rest of Semi-Finalists for the 2012 Buckminster Fuller Challenge Announced! Permalink | Add to del.icio.us | digg Post tags: 2012 Buckminster Fuller Challenge, Biolite HomeStove, Buckminster Fuller, buckminster...