reinvent the toilet challenge, Tag

Researchers at the University of Colorado designed a new toilet called the Sol-Char that zaps poop into biochar using nothing but the sun. Led by Karl Linden, the team installed fiber-optic cables that scorch waste deposited...

Bill Gates helped to invent the personal computer and now, through his philanthropic foundation, he plans to help reinvent the toilet. On Tuesday, the billionaire awarded the California Institute of Technology with a $100,000...