Which two gases make up 99% of the atmosphere?

  1. Ozone and Oxygen
  2. Carbon dioxide and Ozone
  3. Oxygen and Nitrogen
  4. Argon and Ozone
Anurag Mishra Professor Asked on 5th December 2015 in Environment Science.
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Answer: (3) Oxygen and Nitrogen 

Anurag Mishra Professor Answered on 5th December 2015.
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