How long until the ozone is gone?

Excuse me, but could you please elaborate on the current state of the ozone layer and the potential timeline for its depletion? Are we facing an imminent crisis, or is there still time for preventive measures to be taken? Additionally, what are the main factors contributing to the depletion of the ozone layer, and what steps are being undertaken globally to mitigate this issue? Understanding these aspects would help us better assess the situation and take appropriate action.