This is my therapy.
There are many like it, but this one is mine.
So, global warming a new phenomenon?
Of course not; it's been creeping on us and Gaia since the dawn of Industrialization. Sadly, it's not that we just learned about this in the 1980s either, or for the Gen Y'ers, with Al Gore's An Inconvenient truth.
No, rather, we've known about the effects of man-made emissions on our atmosphere and ecosphere since...hmmm....about 1958.