Correct option is D
The Montreal Protocol is an international treaty designed to protect the ozone layer by phasing out the production and consumption of numerous substances responsible for ozone depletion. It was adopted on September 16, 1987, and has been hailed as one of the most successful environmental agreements, leading to significant reductions in the use of chlorofluorocarbons (CFCs) and other ozone depleting substances.
Thus, the Montreal Protocol is specifically related to the Protection of the Ozone layer.
