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About 2.6 billion people worldwide do not have access to a sanitary toilet. To fix this, the Bill and Melinda Gates Foundation awarded eight grants last year to scientists and engineers to invent a toilet that could function without piped water, a sewer system or outside electricity-and would cost less than 5 cents a day to operate.

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top ten crazy eco ideas french urine powered battery

top ten crazy eco ideas french urine powered battery


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