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yengracojorisboo yengracojorisboo
  • 13-12-2015
  • Biology
Answered

How often does oxygen cycle through the atmosphere?

Aabout every 1000 years
Babout every 1500 years
Cabout every 2000 years
Dabout every 2500 years

Verified Answer :

Sophiag1315 Sophiag1315
  • 13-12-2015

about every 2000 years.

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nrlindly
nrlindly nrlindly
  • 06-02-2019

B. about every 2000 years


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