I think I know where the Global Warming Moonbats may have gotten their idea about Earth Global Warming (GW).
Back it the 1970s, the Soviets sent a series of unmanned spacecrafts called Venera. Those Russian probes discovered a very thick atmosphere containing droplets of sulfuric acid and other gases, which reflected the heat back to the planet. And as of consequence, The Venus temperatures can reach about 900 degrees Fahrenheit.
Venus's atmosphere main constituent is...as you can guess ... is carbon dioxide. The same pollutant the GW Moonbats say that will doom us. LoL!
I read about this revelation not in some scientific magazine or journal, but standing at a super market checkout stand back in 1978.
To digress, the Moonbats received there first "news" of Global Warming from the cover of the National Enquirer, which asked the question 'Can this happen here on Earth?"
So Commie spacecrafts brought the news of Global Warming to the world of Moonbats who read the National Enquirer.
How ironic. :-)
Nah, Cousteau was whining about it back in '74.