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Environmental Science in Agricultural
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Maximum oxygen comes from

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Correct Answer: Option A
Maximum oxygen comes from Phytoplankton.
50% of the oxygen in our atmosphere has been produced by phytoplankton. Like plants and trees on land, phytoplankton gives us a lot more than food.
One type of phytoplankton, Prochlorococcus, releases countless tons of oxygen into the atmosphere.
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