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Earth's atmosphere is overwhelmingly composed of nitrogen

HERE’S THE INTERESTING PART

Take a deep breath and thank oxygen, right? Wrong. You are mostly inhaling cheap filler. Roughly 78 percent of every breath you take is entirely composed of inert nitrogen gas that your body totally ignores. Oxygen barely makes up a measly 21 percent, which really puts our breathing ego in check.

Earth's atmosphere is overwhelmingly composed of nitrogen
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