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Bill Gates launches toilet reinvention crusade
Billionaire hopes next-generation super bowls will make a splash within 3 yearsThe Associated Press Posted: Aug 15, 2012
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.
They are part of a Bill & Melinda Gates Foundation competition to reinvent the toilet for the 2.5 billion people around the world who don't have access to modern sanitation.
Scientists from around the world have taken up the challenge, and the foundation announced some