Obama's "Clean Power Plan" was a wrong-headed mistake, guaranteed to make American power more expensive while not meaningfully cleaning anything. EPA is now working to rectify Obama’s CPP and has unveiled a replacement called the "Affordable Clean Energy" rule.
It looks like EPA Administrator Scott Pruitt has a good procedural argument for reopening the Obama era false finding that CO2 emissions endanger human health and welfare.
CFACT Senior Policy Advisor Paul Driessen makes a strong case for full reversal of the EPA's "endangerment finding" it used to attack the coal industry and ultimately all fossil fuel energy -- the EPA lied, falsified documents, and excluded contradictory testimony from the hearings to ensure that fossil fuels did not get a fair trial.