Mr. Wichian said the advantage of Thailand using Euro 4 standard since 2012 which same year of first car project (government policy) has started and affect to increase 9% of vehicle from 5% but pollution does not increase along with the increasing of vehicle. If still using Euro 2 – 3 standard, rate of morbidity of citizen will be increased. However, the cost of fuel will rise more than 0.4 baht/Liter. It is burden of the citizen but it is worth.