It is important to remember that the Clean Power Plan, the subject of this ruling, was never implemented. They took this case to strike a blow to lay low the EP

It is important to remember that the Clean Power Plan, the subject of this ruling, was never implemented. They took this case to strike a blow to lay low the EPA, no plaintiff had any standing. It is telling that just this particular iteration of the Supreme Court decided that the EPA lacked this regulatory authority; as early as 2007 a conservative Supreme Court ruled CO2 was a pollutant and compelled the Bush Administration to regulate it as such, even though EPA at the time was loathe to do so, leaving no doubt the power of the EPA to regulate. The EPA's regulatory authority was only ever a question worthy of raising when the Supreme Court's composition changed; conservative judicial radicalism was normalized, hence the ruling. There was no deeper principle behind this ruling.