What's going on with the hole in the ozone layer?

Thanks to a global effort to regulate ozone-depleting substances, the ozone hole is showing signs of recovery and is projected to return to a healthy level by mid-century.Ozone layer hole, Ozone depletion, Recovery efforts, Environmental progress, Ozone-depleting substances, Global regulations, Healthy ozone levels, Mid-century projection, Climate protection, Environmental awareness, Atmospheric healing