Where Does Your Sewage Go? | I Didn’t Know That

Visit the Becton Sewage Treatment Works—one of Europe’s biggest plants—which processes sewage from 3.4 million Londoners into water clean enough to return to the Thames. ➡ Subscribe: #NationalGeographic #Sewage #IDidntKnowThat About I Didn’t Know That: Two industrial scientists, Richard Ambrose and Jonny Phillips, explain the science behind everyday life... from microwave ovens to beating a lie detector. Get More National Geographic: Official Site: