According to the United Nations Environment Programme, the ozone layer is predicted to fully recover by 2066 at the latest, provided that effective policies remain in place. For the majority of the world, the ozone layer may even fully heal as early as 2040, which is encouraging news.
Many of these policies include banning ozone-depleting substances, such as chlorofluorocarbons and hydrochlorofluorocarbons, which were banned in 1994. However, plenty of other substances have also been banned — around 99% of them. As a result, the continued implementation of these policies may help to mitigate global warming by up to 0.5 degrees Celsius.