Biology, 19.01.2020 13:31 hammackkatelyn60

Most of the earth's oxygen occurs in the form of minerals in the crust and mantle. the oxygen that is available in the atmosphere is used primarily by plants, animals, and bacteria to perform cellular respiration.

why is running out of oxygen still not a real concern?

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Most of the earth's oxygen occurs in the form of minerals in the crust and mantle. the oxygen that i...

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