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What's In My Air, And Why Is It Important?, air - skcollege.org
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What's In My Air, And Why Is It Important?

What's In My Air, And Why Is It Important?

Everyone knows there's oxygen in our air - if there wasn't oxygen in the air you're breathing right now, reading this blog would be the least of your concerns. Most people know that oxygen, in fact, makes up about 20% of the earth's atmosphere at sea level, and that almost all the rest is nitrogen.…

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