You may remember not so long ago the hole in the ozone layer was the major scientific apocalypse story out there in the world. It could have proved devastating for society, but - after the Montreal protocol banned and heavily regulated the substances that were causing the problem, the ozone hole has begun to shrink and the crisis has died down. In this episode, I'll talk about the story of the ozone hole and what - if anything - it can teach us about our own efforts to combat greenhouse gas emissions and climate change.