The CFC that caused the issue in the first place will take a long time to completely disappear. Also we haven’t completely stopped using them, and apparently since 2012, the CFC production started to increase again in Asia.
It also seems that the Tonga eruption played a role in the expansion.
I heard Starlink satellites could play a role, but it’s probably minuscule compared to what CFCs can do.
The CFC that caused the issue in the first place will take a long time to completely disappear. Also we haven’t completely stopped using them, and apparently since 2012, the CFC production started to increase again in Asia.
It also seems that the Tonga eruption played a role in the expansion.
I heard Starlink satellites could play a role, but it’s probably minuscule compared to what CFCs can do.
Sources :