'The problem is that, if they get rid of this plan, they are legally required to come up with another one -- in order to repeal regulations, federal agencies have to follow the same rule-making system (requiring periods of public notice and comment) used to create regulations. 18 state attorneys general and several environmental advocacy groups had previously moved to defend the rule, and they may challenge. Removing regulations on coal-fired power plants wouldn’t necessarily bring back a lot of coal jobs. as mountaintop removal mining, is done by machines. Even with the Clean Power Plan in effect, it would have been tough for the United States to meet its Paris agreement targets. Without the plan or another one at least as stringent on greenhouse gases, it will be nearly impossible, experts say.'