Sorry, one of the authors was an economist. The other author was an environmental scientist posted in the National Center for Environmental Economics. Mea culpa.
This has been suppressed, though long known, and it is one of the items mentioned in other articles concerning this EPA, agenda driven policy making so-called "coverup". It is not just a talking point, as you put it...
The models didn't properly take this factor into account, which is part of the why the computer models are quite wrong. Otherwise, why exactly have we been cooling a bit, worldwide, for a while now? Oh, but they ignore that SET OF FACTS, also. Which are not just recycled, needed to be rejected "talking points".
But don't let that stop you. Cherry pick what you want science to say & mean. You'll never be lonely, doing it that-a-ways...