Here is the backgrounder on the form of standard that CARB is considering to implement AB 1493. My attention was drawn to the grams per mile of of CO2. Keep in mind that combustion of a gallon of gasoline is equivalent to producing roughly 20 pounds of CO2. So, a 200 grams/mile of CO2 is roughly equivalent to 0.5 pounds/mile or a fuel economy of 40 miles per gallon.