Edited sentence: , section 1.3 documents this.1 is a commonplace see CFC for example.2 is also commonplace: e.3 is given in the same source, or even the SEPP page.4 ditto, "The situation changed in 1991, however, when NASA scientist C.CFCs with lifetimes of decades and longer.Rinsland published data showing HCl increasing at about half the rate of HF, suggesting both natural and man-made sources (13)" says even SEPP, or the ozone depletion page.SEPP don't say which of 1-4 they consider controversial, so they must be considered one by one.This claim can be seen to be false by breaking the statement into components:.Thus we see that each of statements 1-4 is true, and uncontroversial: the original statement is hence also true, and uncontroversial: the original SEPP claim is thus shown to be false.and there release chlorine.become well-mixed in the atmosphere.percolate into the stratosphere