True! But how do you explain scientists who state in my last link,
" The scientists were somewhat surprised that the ozone is thinning out in the lower stratosphere because their models do not show this trend and CFCs continue to decline.
Certain aspects of their findings are not completely unexpected, however.
"Thanks to the Montreal Protocol, ozone in the upper stratosphere - ie above 30 kilometres - has increased significantly since 1998, and the stratosphere is also recovering above the polar regions," said William Ball, researcher at ETH Zurich.
Despite these increases, measurements show that the total ozone column in the atmosphere has remained constant, which experts took as a sign that ozone levels in the lower stratosphere must have declined.
The reasons for the continuing decline are still unclear}" 🤔