I'm not fluent in the decision yet, but at first glance: It seems congress gave them limited power to regulate environmental protection via a law that was writ

I'm not fluent in the decision yet, but at first glance: It seems congress gave them limited power to regulate environmental protection via a law that was written. The EPA seems to have overstepped its legal boundaries in regulating. Instead of saying, "ah fuck it, let the machine run," the court is forcing congress to actually give it the additional power that it's been using, or to stop.