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21. What is the most abundant greenhouse gas?

A. Ozone
B. Carbon dioxide
C. Methane
D. Water vapor


Sagot :

Final answer:

Water vapor, carbon dioxide, and methane are important greenhouse gases with varying abundances and impacts.


Explanation:

Water vapor is the most abundant greenhouse gas on Earth, contributing significantly to the natural greenhouse effect. Despite its abundance, it is mainly controlled by temperature and natural processes. Carbon dioxide is another greenhouse gas, less abundant but increasing due to human activities like burning fossil fuels. Methane is also a potent greenhouse gas, but its impact is significant despite its lesser concentration.


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