Since CFC materials were banned in 1987 due to their harmful impact on the ozone layer, it has been slowly healing. In these past decades, the rocket industry bloomed, and more and more rockets are being sent to space. The combustion of the fuel needed for space rockets is known to have a catastrophic impact on the ozone layer.
Photo by: https://pixabay.com/photos/rocket-launch-rocket-take-off-67723/