Some time back there were some scientific developments that cast doubt on the old assumed "CFC breakdown effects" and which in turn throw into doubt the entire "ozone hole" arguments. But it's interesting that once government gains control of an area or a subject matter, they don't let go.
Same with the "asbestos threat." And many other examples.
Care to even reference that study? IMO we have real and serious environmental issues, IMO CFCs are one of them. Global warming just serves as a red herring to distract from the real issues like the dangers of nuclear energy, fracking, or pharmaceuticals at detectable levels in the water supply.