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[–] 15 points 4 months ago (4 children)

Probably because Nitrogen is more expensive.

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  • [–] 7 points 4 months ago

    Most likely. And actually humane gases would be rarer and more dangerous to ... well, humans working there.

    CO^2 is The gas that causes panic since that's what the body uses to regulate it's oxygen/carbon cycle. It's a built in alarm. Plus you can just vent it to atmosphere. And it's cheap.

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  • [–] 2 points 4 months ago (1 child)

    I'd think you could build some machine to (re)harvest nitrogen from the air and it would eventually be free. But maybe that doesn't exist / super hard to do...

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