Sure it has been. At the moment most scientists think that the current crop of climate change is man made. That's just how it is and that's the reason why the term global warming currently usually implies man made.
You will not change that by complaining about definitions and how words are used. In the 19th century light implied aether. No change of the dictionary could change that, there had actual scientific work to be done to change that.
> At the moment most scientists think that the current crop of climate change is man made.
This is the part of the issue under debate...
However: the world appears to be warming up - that is why the phrase global warming was used. There was no man made connotation either way when it was first used. The linking has been made for various reasons.
Aw, now that sounds so devilish. I don't think so. I would guess that most climate scientists were just fed up with saying "global warming that is caused by humans ..." and shortened that to "global warming". No big deal, and happens all the time. Scientists that don't think so must now say "global warming that is not caused by humans ...", but if they are convincing they surely will be able to shorten their version :)
You will not change that by complaining about definitions and how words are used. In the 19th century light implied aether. No change of the dictionary could change that, there had actual scientific work to be done to change that.