What gas important to life was absent from earth’s earliest atmosphere? A. oxygen B. methane C. carbon dioxide D. nitrogen

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asked Nov 25, 2016 143k views

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Albert Paul · Answer 1 · 2016-12-02T03:10:53+0000

We use this gas for breathing. It is all over the air. Plants gives us this gas also. It is part of what makes us alive. Therefore, the gas is called Oxygen.

What gas important to life was absent from earth’s earliest atmosphere? A. oxygen B. methane C. carbon dioxide D. nitrogen

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