Are bats harmed by fumes that gather in old mines?
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Once in Nevada, I saw a sign on an old abandoned mine that said two things,
- Stay out, mines have noxious fumes.
- Stay out, bats live here.
Both of those are good reasons to stay out, but it seems like a contradiction that there would be both fumes and bats so would the bats be harmed by them fumes?
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