Even taken at face value, the EPA's claims of economic benefits are highly doubtful. In fact, the reductions to mercury are expected to produce only a tiny sliver of that $140 billion benefit — just $6 million of it, in fact. But it will cost so much money to comply with these rules and produce this miniscule benefit that many plants will simply be closed instead. According to Dr. Anne Smith, senior vice president of NERA Economic Consulting's Global Environment Group, all of the EPA's estimated benefits from the Utility MACT rule come from “coincidental reductions” of fine particulate matter, which is regulated by a totally separate section of the Clean Air Act. Diehard environmentalists will be pleased that the closures will cause other pollutants to disappear, but the general public will be deprived of the electricity that those plants produce.
Obama also said in 2008 that “if somebody wants to build a coal-powered plant, they can. It's just that it'll bankrupt them.” He seems to be making this come true, even without the carbon cap-and-trade system he once envisioned.
— The Washington Examiner