Beijing (CNN)Bill Gates stunned the crowd in Beijing on Tuesday with a jar of human feces in his hand.
The Microsoft founder was hosting the Reinvented Toilet Expo. His pitch? To commercialize futuristic toilets that don’t need water or sewers.
“Today, rich countries have a sewage system where you bring water in, put the human waste in it and it goes out to all the way to a treatment processing plant,” Gates told CNN.