Describe the international efforts that are currently in place to protect the ozone shield. What evidence is there that such efforts have been effective?

International efforts like the Vienna Convention and the Montreal Protocol have been instituted to protect the ozone layer. These initiatives primarily aim to eliminate the consumption and production of substances causing ozone depletion. Evidence of their effectiveness includes a decrease in the rate of ozone layer depletion and a reduction in the size of the ozone hole, especially over the Antarctic. However, there are ongoing challenges, such as unexpected increases in emissions of some banned ozone-depleting substances. These challenges are quickly addressed by the international community and draw attention to the link between climate change mitigation strategies and ozone layer protection.