The ozone hole didn't cause global warming, but climate and the ozone hole are related in other ways.
Some of the chemicals that replaced ozone-harming CFCs are long-lived greenhouse gases. At NOAA's lab in Boulder, Colorado, chemist Steve Montzka leads the effort to monitor the concentration of CFC-substitutes and their potential impact on global warming.
Early development of the ozone hole was moderated by active weather that mixed in ozone-rich air from lower latitudes.
But the Montreal Protocol is working: the hole in our planet’s UV-blocking ozone layer was smaller than those of the 1990s and 2000s.