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Ozone layer of upper atmosphere is being destroyed by

1. Sulphurdioxide
2. Carbondioxide
3. chlorofluorocarbon
4. Smogg

Correct answer: chlorofluorocarbon

Solution

Chlorofluorocarbons (CFCs) reach the upper atmosphere, where ultraviolet radiation breaks them down and releases chlorine radicals. These radicals catalytically destroy ozone molecules, thinning the ozone layer.

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