It turns out western toilets just don’t work for developing countries because of the supporting infrastructure they need, notably sewer lines and treatment facilities. So Gates set a challenge for university researchers to reinvent the toilet, and the results were surprisingly good. However, Gates isn’t one to shy away from good ideas, and his attention has also turned to the Janicki Bioenergy Omniprocessor.
This machine takes in large quantities of untreated human waste and turns it into electricity, drinking water, and ash. You can see Bill Gates drinking the water it produces in the video below. A few minutes earlier that water was human waste.