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0. Figure below shows the position of layer P in the Earth's atmosphere that protects the Earth from over-exposure to harmful ultraviolet radiation. Which of the following chemicals cause the hinning of layer P? (NTSE Stage-II, 2008-09)
Which of the following chemicals cause the hinning of layer P? (NTSE Stage-II, 2008-09)
Carbon monoxide
Sulphur dioxide
Chlorofluorocarbons
Both (1) and (3)
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