I can't begin to tell you just how horrible this Chevron ruling is, and as usual with the Roberts court, in an earlier ruling in which the conservatives anointed themselves final authorities on everything, they got an important detail very wrong. Via the New Republic:
On Thursday, the justices ruled in favor of Ohio and several other states that challenged the Environmental Protection Agency’s plan to bring them into compliance with ozone pollution–control requirements. The justices’ ruling allows the EPA’s plan to remain paused as the states’ challenge proceeds through the courts. Laying out the context for that decision, Justice Neil Gorsuch—who authored the majority opinion—noted that the EPA “set as its target the reduction of the emissions of one ozone precursor in particular: nitrous oxide,” going on to explain that the agency “sought to impose nitrous oxide emissions control measures that ‘maximized cost-effectiveness.’”
