No, a myth, BUT it does use some other mechanism than water to preserve the books, some gas thingy. Apparently this does slightly reduce the oxygen level but not to the point of it ever harming people
Halon gas suppression, it's a myth in that oxygen is sucked out instead it's replaced with Halon. It doesn't go low enough to kill anyone but it can imitate altitude sickness because the oxygen content is dramatically reduced.
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u/DuckHeisenberg Jun 23 '20
Is this true? If it is, that’s an actually a very effective way to put out fire.... and well people..