How long will the ozone layer last?

The magic 8 ball says: "My sources say No." No one knows where that particular "feature" is going. The record largest ozone hole was 2007, and the ozone hole for 2008 was not much smaller. The amount of UV-B that arrives at Earth's surface varies by year, and by 11 year solar cycle. Effects that are believed to be closely tied to the amount of UV-B that arrives on Earth's surface show a long-term upward trend. Plants absorb water vapor, and produce oxygen. What we do to plants, we do to the ozone layer (as much as we do anything to the ozone layer).