Different blends of biodiesel (B5, B10, B15, and B100) and reference fuel diesel are assumed to be used in a diesel vehicle with claimed mileage of 27.6 km/L (MS 2016). We assume actual on road mileage of 70% of the claimed mileage for our calculation . Emission factors for diesel vehicle are taken from a report by Centre Pollution Control Board of India . Emission factor for different blends of biodiesel are scaled based on a report published by Air Quality Expert Group .