... density at main crossroads in HoChiMinh city is very high, traffic-jams regularly happen at main point, increase remarkable air pollution level IV AIR POLLUTION IN HOCHIMINH CITY 4.1 Main pollution ... 4.1.1.Iindustrial production source Major sources polluting in industry production in HoChiMinh city are Thermo-electricity, cement, steel laminating and refining, weaving and dying, food processing, ... Emission Factors The Netherlands 1983 Le Van Khoa, Air quality in HoChiMinh city, Vietnamese and French Workshop on Transportation and Environment in HoChiMinh city, May 2002 PS-4- ...