15. What has happened because of the Montreal Protocol? square

The Montreal Protocol has successfully led to the phase-out of ozone-depleting substances, such as chlorofluorocarbons (CFCs) and halons, which were responsible for the depletion of the ozone layer. This international treaty has helped to protect the ozone layer, prevent harmful ultraviolet radiation from reaching the Earth's surface, and mitigate the risks of skin cancer, cataracts, and other adverse health effects.