It actually goes back to the 20's and earlier.
A history of the "global warming" movement.
http://john-daly.com/history.htm
I wasn't around back then, so thanks,

. Seriously, I knew that human = unnatural Luddism was a part of Progressivism from the 19th Century, but had not heard that
Global Worming was an aspect thereof. The amount of Progressive Luddite pseudo-science that pervades our culture is dismaying:
* Environmentalism;
* Organic/natural food
* Alternative "medicine";
* Nutrition fads and "nutritional supplements";
* FrankenFood Fauxbia.
To name a few.