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Associated Press
Tove Larsen, second from right, of Eawag, the Swiss Federal Institute of Aquatic Science and Technology, talks about their diversion toilet at the "Reinventing the Toliet" Fair, Tuesday, Aug. 14, 2012, in Seattle, which is part of a Bill & Melinda Gates Foundation competition to reinvent the toilet for the 2.6 billion people around the world who don't have access to modern sanitation. (AP Photo/Ted S. Warren)

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