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How often does oxygen cycle through the atmosphere? a. about every 1000 years b. about every 1500 years c. about every 2000 years d. about every 2500 years

How often does oxygen cycle through the atmosphere? a. about every 1000 years b. about every 1500 years c. about every 2000 years d. about every 2500 years
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How often does oxygen cycle through the atmosphere?

a. about every 1000 years
b. about every 1500 years
c. about every 2000 years
d. about every 2500 years

asked
User Damodar
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7.5k points

2 Answers

5 votes

B. about every 2000 years


answered
User Ddomingo
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7.8k points
6 votes
about every 2000 years.

answered
User AbdealiLoKo
by
8.8k points
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