AdvertisementHere, Drink A Nice Glass Of Sparkling Clear WastewaterPlay04:48Download AudioNovember 07, 2013Amy StandenfacebookEmailOne man's sewage is another man's drinking water. As wastewater comes through this pipe, straw-like filters get rid of any contaminants wider than a human hair. That's just one step of the purification process. (KQED)
