question_answer 21)

Which of the following gases is not a greenhouse gas? (a) \[CO\]                                            (b) \[{{O}_{3}}\]                                               (c) \[C{{H}_{4}}\]                              (d) \[{{H}_{2}}O\]vapour

Answer:

 (a) The gases which absorb sunlight energy near the earth's surface and then its radiation back to the earth are called greenhouse gases. Carbon dioxide, water vapour, methane, ozone, oxides of nitrogen, chlorofluorocarbons, etc., are greenhouse gases. CO is not a greenhouse gas.