कौन सी गैस ग्रीन हाउस गैस नहीं है-
Which of the following gas is not a green house gas-

  • 1

    CO𝟐

  • 2

    NO𝟐

  • 3

    C𝑯𝟐

  • 4

    O𝟐

Answer:- 4

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