Okay, first, it was my understanding that the ozone layer issue did not have anything to do with global warming, but with protection from UV rays. Second: Man made? Proof? It happened before naturally and there's no documentation that I know of showing that this cycle - repeat, CYCLE - is any worse or even any different. This is more fearmongering over a system that is so complex we can neither completely understand nor hope to control it.
I never bought into the "ozone depletion by Freon" argument. Ozone layer is at the edge of the atmosphere and the Freon chloro-flourocarbon chemicals' molecules are heavier than air. How then does it get up there to destroy ozone? They have never really explained that to any satisfactory level........