Environmentalists detail legal attacks on Trump EPA ‘once in’ air rule

Environmentalists are detailing their legal attacks on the Trump EPA’s rule ending a longstanding “once in, always in” policy that required “major” sources of air toxics to always meet stringent pollution control requirements even if they lower emissions significantly, saying in a new filing that the decision violates key Clean Air Act provisions. But the Biden administration is asking a federal appeals court that is hearing the challenge over the policy to place the case in abeyance so that it...