SCOTUS blocks EPA Good Neighbor clean air rule 5-4 halts downwind state protections

The Supreme Court votes 5-4 to halt the EPA's "Good Neighbor" rule, which required upwind states to reduce industrial air pollution that drifts downwind and causes smog violations in states that cannot meet air quality standards on their own. The rule was intended to protect roughly 100 million Americans in downwind states from pollution originating in 23 upwind states. Justice Gorsuch writes for the majority that states challenging the rule are "likely to prevail", a factor justifying blocking it pending appeals court review. Justice Amy Coney Barrett dissents with the three liberal justices, writing that she doubts the challengers will ultimately win. The ruling is part of a broader Supreme Court pattern of blocking EPA air quality regulations.