If any changes do come in, performance makes such as Lamborghini and Porsche will be hit hardest. Lamborghini has the honor of producing the world’s worst C02 offender with its Murciélago supercar. Although it’s unknown how the US Supreme court’s ruling will be interpreted by the US Environmental Protection Agency, it’s highly probable that there’ll be new regulations limiting the allowable levels of CO2 emissions from motor vehicles.
Previously, C02 was deemed as harmless, which meant car manufacturers never focused on reducing its levels as they have done with other smog-forming pollutants. If the allowable level of C02 is reduced, carmakers will be forced to reduce the amount of fuel consumed at the expense of performance.