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A gas 'X' which is a deadly poison is found at the higher levels of atmosphere and performs an essential function. Name the gas and write the function performed by this gas in the atmosphere. Which chemical is linked to the decrease in the level of this gas? What measures have been taken by an international organization to check the depletion of the layer containing this gas?
Assertion (A) : Ozone layer protects the surface of the Earth from harmful UV radiations. Reason (R) : Chlorofluorocarbons (CFCs) are responsible for depletion of ozone layer.
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