does methane have anything to do with ozone depletion?

Question

http://www.ciesin.columbia.edu/docs/011-466/011-466.html

What Drainage basin does Michigan belong to?

I have answered this one a couple of times already. Can I direct you to the statement in the conclusion in DrBob's article. "Indeed, the conclusion of the 1991 International Scientific Assessment was that 'the weight of evidence suggests that the observed middle- and high-latitude ozone losses are largely due to chlorine and bromine'"