Earth’s atmosphere has less carbon dioxide because:
(a) Green plants fix carbon dioxide during photosynthesis.
(b) Most marine animals use carbonates dissolved in sea water and make their shells.
Question
Large amount of carbon dioxide is produced during cellular respiration, burning of fossil fuels and forest fires. Still the concentration of carbon dioxide in Earth’s atmosphere is only 0.03%. On the planets Venus and Mars, it constitutes 95-97% of the atmosphere. Give reason for this difference.
- Natural resources CBSE Class 9
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