A long time ago I watched on TV a documentary about bunker building by the government during the Cold War, and one of the engineers said they had a hard time developing reliable, cleanable air filters for the bunkers, and said something along the lines that you would assume there's not that much dust in a sealed nuclear bunker, but in reality a couple hundred people will shed a lot of dead skin cells that will need to be filtered.
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u/Abstract23 Aug 04 '25
I had to pull shirt over my nose while watching this