Photo: The Gates Notes
Sanitation is a serious issue in many countries.The number one killer of children in the world is disease caused by contact with feces.
Toilets, or lack of toilets, are a big part of the problem. Many third-world countries don’t have them and current models are not efficient.
Bill Gates wants to fix that. He called for a Reinvent The Toilet challenge and several universities submitted designs.
CalTech took home first prize with its solar-powered toilet that generates both electricity and hydrogen. England’s Loughborough University received second with a toilet that turns human waste into biological charcoal, minerals, and even clean water.
Here were the best proposed pots.