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Question

The greenhouse effect is possible if the percentage of $C O_{2}$ is:
0.01 %
0.03 %
0.15 %
0.02 %

A

0.01 %

B

0.03 %

C

0.15 %

D

0.02 %

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Solution

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The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions.
Only above 0.03% of $C O_{2}$ causes green house effects.

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