>but why does any federal body have this authority? The current "Advanced Clean Cars II" is operating under a federal EPA waiver for California and 12 other st

>but why does any federal body have this authority? The current "Advanced Clean Cars II" is operating under a federal EPA waiver for California and 12 other states. The EPA regulates sources of pollution, which includes internal combustion automobiles. The current waiver allows California (and the other states with identical legislation) to have stricter pollution standards for cars than the rest of the U.S.. California could institute a special sales tax on internal combustion engine vehicles and raise the rate on gas taxes without federal interference.