Science
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:
- Ozone; CFCs
- CFCs; rays UV
- CFCs; Ozone
- UV rays; Diatomic oxygen
Pollution
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Answer
CFCs, Ozone
Reason — In 1987, an agreement was formulated by the United Nations Environment Programme (UNEP) to freeze the production of CFCs to prevent the depletion of Ozone.
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