In a close look at how the Clean Air Act treats pollution from burning plants and trees, the court decided whether the government can treat those emissions differently from the smokestacks of a coal plant. The current legal debate centers on whether invalidating California's waiver would actually change automakers' manufacturing decisions enough to help fuel producers—a question that isn't clearly addressed in the Clean Air Act itself but has significant implications for who can challenge these environmental regulations in court.

music for the podcast provided by ⁠⁠⁠⁠⁠⁠ Dimitry Taras