What percentage of global oxygen production comes from marine organisms like phytoplankton?

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A About 10%
B About 25%
C About 50% to 80%
D Exactly 99%

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Answer: C. About 50% to 80%

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• Explanation: C) About 50% to 80% is correct because marine plants and drifting algae generate the majority of the oxygen we breathe on Earth.

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What percentage of global oxygen production comes from marine organisms like phytoplankton?

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