Guest Bill Mitch says it’s no secret the world is running short of fresh water. As a civil and environmental engineer, he sees wastewater as a potential solution, if only we can eliminate the impurities. Mitch designs systems to remove toxic chemicals from wastewater to enable its reuse as a drinking water supply. It’s not easy, but it costs half as much as desalinating seawater, Mitch tells host Russ Altman on this episode of Stanford Engineering’s The Future of Everything podcast.