Oh hell. Clinton/Gore predated them in 1993 with Algore's "Carbon Tax" caper.
Even some Democratic congersmen figured out that was a non-starter and would get them unelected very quickly. So the "Carbon Tax" was killed early in the Clintooooooon/Algore imperial fiasco.
Incidentally, Clintoooooooooooon was bragging in Montreal that he wrote part of the Kyoto Accords. In point of fact, he didn't even sign them. Algore did.
Everything a liberal says has the connotation of "tax" embedded in the statement.
This will continue until the word "tax" is no longer a viable want of the public.
Then they will just call it something else....