What is the primary purpose of the Montreal Protocol?

The primary purpose of the Montreal Protocol is to limit the use of ozone-depleting substances. This international treaty was established in response to the alarming depletion of the ozone layer due to chemicals such as chlorofluorocarbons (CFCs). The agreement aims to phase out the production and consumption of these substances, which are known to cause significant harm to the ozone layer, ultimately protecting it from further damage.

By focusing specifically on ozone-depleting substances, the Montreal Protocol plays a crucial role in environmental protection, as a healthy ozone layer is essential for shielding the Earth from harmful ultraviolet (UV) radiation. This radiation can lead to increased rates of skin cancer, cataracts, and other health issues, as well as negatively impacting ecosystems and wildlife.

While other options reference important environmental concepts, none address the specific focus and impact of the Montreal Protocol as directly and accurately as the choice regarding ozone-depleting substances. Thus, the correct choice reflects the treaty's main goal of safeguarding the ozone layer for future generations.