Oh that's it! you are soooo banned! Crap! I don't have a ban hammer so lets just pretend! xDA confined space only has one way in and out according to MSHA, which is much stricter than OSHA. OSHA only comes around after an accident, MSHA comes around several times a year. So as long as our tunnel had more than one exit it would not be defined as a confined space and not need forced air to meet MSHA regulations., This is in jest Tin so please don't ban me. Although even with more than one exit, any heavier gases would still hang around and be dangerous, but maybe we could craft air monitors which would alert us to dangerous gas levels or we introduce parakeets. I like parakeets.

Yeah, you're right on the names, ty for the correction.
Oh! *taking notes* have birds die when gas is released.. hehe
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