National Public Radio: The Reinvent the Toilet Challenge asked engineers to dream up a replacement for the antiquated flush toilet. Michael Hoffmann and his team at Caltech responded with a solar-powered toilet that disinfects waste and reuses wastewater to flush. Better yet, it pumps out hydrogen gas for use in fuel cells.
URL: http://www.npr.org/2012/08/17/159003117/solar-toilet-disinfects-waste-makes-hydrogen-fuel?ft=1&f=1025
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