Nitrogen is a gas that pretty much no one cares about and our bodies don't metabolize it, yet it makes up 79% of the air we breathe. Given that we only require oxygen, could you replace nitrogen with any other inert gas and breathe just fine? Submitted by SalemStarburn t3_11qokao on March 13, 2023 at 10:47 PM in askscience No comments 3