SEATTLE — These aren't your typical loos. One uses microwave energy to transform human waste into electricity. Another captures urine and uses it for flushing. And still another turns excrement into charcoal.
Gates foundation seeks to help 2.5 billion without modern sanitation
Tuesday, August 14, 2012 | 9:39 p.m. CDT;
updated 10:25 p.m. CDT, Tuesday, August 14, 2012
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