Annual pollution-related savings of displacing cars from road (in £) = Number of car kilometres saved per year * [(% of petrol cars)*0.034 + (% of diesel cars)*0.25 + 0.005] * inflation since 1997
Annual pollution-related savings of displacing cars from road (in £) = Number of car kilometres saved per year * [(% of petrol cars)*0.034 + (% of diesel cars)*0.25 + 0.005] * inflation since 1997