When California officials struck a deal in July with four automakers to abide by the state's tougher standards, the E.P.A. formally revoked California's authority, prompting a lawsuit.

今年七月，加州官员希望四家汽车制造商遵守加州制定的更为严格的标准，就在双方就此达成协议后，环保署正式剥夺了加州发号施令的权利，并因此引发了一场诉讼。