California air regulators approved a cut to carbon pollution from gasoline and diesel fuels. This will force oil producers to reduce the amount of carbon generated by transportation fuels in the state. This rule was added in 2009 but many oil and gas companies protested, and were able to keep it at bay until recently. Oregon is the only other state with a carbon fuel standard like California’s. This new ruling is now projecting that fuel cost could possibly rise 13 cents per gallon by the year 2020.