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In 1987, an agreement was formulated by the United Nations Environment Programme (UNEP) to freeze the production of “X” to prevent depletion of “Y”. “X” and “Y” respectively referred here are:
The correct option is (c) CFCs; Ozone. In 1987, the Montreal Protocol was signed to stop production of chlorofluorocarbons (CFCs), which deplete the ozone layer that protects Earth from harmful ultraviolet radiation. This step helped save the ozone.
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