The greenhouse effect is possible if the percentage of CO2 is:
A
0.01 %
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B
0.03 %
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C
0.15 %
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D
0.02 %
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Solution
The correct option is B 0.03 % 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 CO2 causes green house effects.