During the process of making food , most of oxgyen is released in the atmosphere
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Oxygen has been released mainly by photosynthesis, which involves the consumption of carbon dioxide. Most photosynthesis does not make a lasting contribution to atmospheric oxygen, because the products of photosynthesis undergo decay and oxidation, consuming as much oxygen as was produced in their production.
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yes during photosynthesis O2 is released and CO2 is used up.
whereas during respiration O2 is used up and CO2 released.
during the day there is no elimination of CO2 as the CO2 released is used up by the plants for photosynthesis.
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