• ivanafterall ☑️@lemmy.world
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    10 days ago

    What the other comments aren’t mentioning is that, as you’ve probably learned, poops steam. Put a lot of poops under the ground (i.e. sewers) and that steam has to go somewhere, due to various complex thermodynamic principles that are probably beyond the scope of this question.

    • datavoid@lemmy.ml
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      10 days ago

      Despite the fact that poo steams if it is really cold outside, I have a strong suspicion they did not build a smoke stack to release a cloud of shit-smelling steam in the city.

    • Coreidan@lemmy.world
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      10 days ago

      It’s not poop. It’s people running hot water. That hot water needs to go somewhere and that somewhere are the sewers.

      Hot water flowing through the sewers is warmer than the air temps. The air being vented from the sewers is also hot because of the water.

      As the hot air comes into contact with cold air outside of the sewers you see vapor form as the cold air squeezes condensation from the hot air.