How do scientists know that chlorine is responsible for stratospheric ozone depletion?

In 1987, NASA and a group of scientists flew a modified U-2 spy plane (now called the ER-2) into the ozone hole over Antarctica. During this flight they found that as they entered the hole chlorine compounds went up at exactly the same time that ozone decreased. This measurement was proof that chlorine really was responsible for the ozone hole. (For more read: , Anderson, J.G., W.H. Brune, M.H. Proffett, 1989, Journal of Geophysical Research, vol 94, PP 11465-11479.

And Anderson, J.G. D.W. Toohey, W.H. Brune, 1991, Science, vol 251, pp39-46. More.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.