Why is earth's current atmosphere made up mostly of nitrogen and oxygen?
a. earth is eroding....
![History](/tpl/images/cats/istoriya.png)
History, 26.09.2019 23:00, cuppykittyy
Why is earth's current atmosphere made up mostly of nitrogen and oxygen?
a. earth is eroding.
b. earth is warming up.
c. earth is continuing to cool.
d. earth has living things on the surface.
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Answers: 1
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