Where it goes when you flush
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How Sewers Work (feat. Fake Poop)
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Meet A Professional Poo Diver
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How Chicago Cleans 1.4 Billion Gallons Of Wastewater Every Day | Deep Cleaned | Insider
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How NYC’s Sewage System Treats 1.3 Billion Gallons Of Wastewater - NYC Revealed
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Des Ouvriers du Bâtiment Ingénieux Qui Sont À un Autre Niveau
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What happens after you flush the toilet on a cruise ship?
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Where does your poop go? From flush to renewed water
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