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.
There were environmental laws before there was an EPA, they were administered by other agencies. EPA was created because environmental laws and regs were expanding.
Just like BLM administrates the Federal Land and Policy Management Act, which was enacted by Congress in 1976.
Just like Congress enacted the Occupational Health and Safety Act and the Occupational Health and Safety Administration was created the to administer the Act.
You can do away with these agencies but the laws/legislation are still on the books.
And as often is the case, disputes arise as to how the agency interpretes the legislation and/or how they administer the regulations so lawsuits arise and the courts adjudicate and change/clarify.
As Muddog pointed out, SCOTUS ruled that CO2 was a pollutant and told EPA to investigate the risk/threat of CO2 and if necessary, regulate CO2 within the Clean Air Act.
Both Bush and Obama pushed Congress to pre-empt the president and enact legislation regulating CO2. In 2008 Congress had the big debate and Cap and Trade won out over Cap and Tax. They tried to enact cap and trade in 2009 but that failed so the Senate tried a scaled back version in 2010 but that also failed, after which EPA moved forward first on new facilities and as yet existing facilities.
I hope Harry Reid goes along with your good suggestion!