Which of the following statements with reference to Water Vapour in the atmosphere is/are correct ? 1. It has a role to play in the stability and instability in the air. 2. It acts like a blanket allowing the earth to neither become too cold nor too hot. Select the answer using the code given below :
- A.1 only
- B.2 only
- C.Both 1 and 2
- D.Neither 1 nor 2
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Both statements are true, and UPSC's official key also gives C. Water vapour is a variable gas, from almost nil in cold deserts to about 4 percent of the air by volume in the warm, humid tropics.
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