| (I) \[C{{O}_{2}}\] | (II) CO |
| (III) \[C{{H}_{4}}\] | (IV) \[{{N}_{2}}O\] |
| (V) NO | (VI) \[N{{O}_{2}}\] |
| (VII) Chloroflurocarbons (CFCs) | (VIII) \[{{O}_{3}}\] |
| (IX) Water vapours | (X) \[S{{o}_{2}}\] |
Answer:
6
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