Being idle-free might seem too simple, or maybe it’s so simple you don’t think it will make a difference. According to the EPA, on average, every gallon of gasoline burned creates about 8,887 grams of CO2. CO2 is the gas that contributes to ozone. Your car also releases CH4 and N20 along with the CO2. Those particles get stuck in our air when we have inversion or ozone.