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What is the exceptional events rule? The loophole letting U.S. regulators wipe air pollution from the record
First pushed through by the Republican senator and climate denier Jim Inhofe, the rule has become a “regulatory escape hatch” for states that want to meet federal air-quality standards.
Major investigation shows local governments are increasingly exploiting a loophole in the Clean Air Act, leaving more than 21 million Americans with air that’s dirtier than they realize