Congress doesn't have to act.
The courts have found that under the existing Clean Air Act, the EPA can regulate CO2.
So like so much of what's going on in America today, an idiotic prior Congress, liberal courts, and a commie administration, does the trick.
Congress can act. It can immediately rescind all or most funding for the EPA.
Sounds like the votes are there, even in the Senate. Put it to the vote and make Manchin, Landreau, et al., vote.
Boehner and McConnell and Rinos won’t do this, because, despite the verbal protests, they are in on it.