Question

if plants produce more oxygen than their usage then why not the oxygen level is increasing on earth

Answer 1

because human beings and animals used oxygen more than one plant produce.because they have to do process of respiration(realising energy)through oxygen and on the other hand plants do this these thing in small concentration as compared to human beings


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Answer 2

it happens because the plants to produce but no of animals are more than plants and the ratio is 3:1 so one plant produces oxygen for three animals and they use it for various pur pose and many pollutants nowadays combining with oxygen so the level is not rising

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