Bill Gates: Build a better toilet

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Reinventing the Toliet
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Reinventing the Toliet
Marcos Fiovavanti, of the Ecuador-based "Fundacion In Terris" group, talks about the "Earth Auger Toliet," which is operated by a mechanical pedal and chain system, on display 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)