Which gas has a much lower concentration on Earth compared to Mars and Venus due to the process of photosynthesis?

Name: Which gas has a much lower concentration on Earth compared to Mars and Venus due to the process of photosynthesis?
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Question

Quizplus · Accepted Answer

Photosynthesis on Earth significantly reduces carbon dioxide levels by converting it into oxygen, whereas Mars and Venus have higher concentrations of carbon dioxide due to the absence of such extensive photosynthetic activity.

Which Gas Has a Much Lower Concentration on Earth Compared