AdvertisementBill Gates Crowns Toilet Innovators At Sanitation Fair04:20Download AudioResumeAugust 15, 2012Michaeleen DouclefffacebookEmailBill Gates, co-founder of the the Bill & Melinda Gates Foundation, checks out a toilet demo at the Reinvent the Toilet Fair in Seattle, Wash. The festival featured prototypes of high-tech toilets developed by researchers around the world. (Bill & Melinda Gates Foundation)