Automakers are dismissing California's new carbon-dioxide emissions law as a backdoor way of imposing fuel-economy standards that the federal government failed to pass, according to the Detroit Free Press. "Federal law and common sense prohibit each state from developing its own fuel economy standards," said Josephine S. Cooper, president and chief executive officer of the Alliance of Automobile Manufacturers. Auto companies say the new law would force them to make the same design changes that would have been required if the federal government's Corporate Average Fuel Economy (CAFE) standards been increased. The Alliance for Automobile Manufacturers said it will file a federal lawsuit on behalf of its members to prevent implementation of the California law.