Did I say it's not happening? I have absolutely no idea whether any changes are man made or not, is that clear enough?
I asked the question whether your informed scientific information base will change their minds in my lifetime?
I have lived a very long time and experience indicates that most things are not cast in stone and humans are fallible.
I am surprised that someone as apparently as clever as you is so absolutely certain that human pronouncements are accurate, mine certainly aren't.
Hope that helps you to question your certainties more closely and that you live a long and happy life, I certainly have.