Sources of air pollution due to transport activities Along with the process of industrialization and urbanization, the motor transport in our country increased very rapidly, especially in the municipalities. Before the late 1980s about 80-90% of the population of the municipality of travel by bicycle, today, in contrast to about 80% of the population of the municipality of driving your car, you. Sources of emissions from transport have become a major source of pollution for the environment in urban air, especially in major metropolitan such as Hanoi, Ho Chi Minh City, Hai Phong, Da Nang City. According to the assessment of environmental specialists, urban air pollution caused by transportation cause about 70% proportion.According to the data of the Hanoi traffic police, in 1990 there cars there in 1995, 34222 60231 airport 2000, have 130,746 the car in traffic. So after 10 years the number of cars in Hanoi increased almost 4 times. About motorbike in Hanoi in 1996 and has about 600,000 new motorcycles, nearly 1 million in 2001, in 2002 increased to more than 1.3 million motorcycles, the average about 1/2 the motorcycle people. In Ho Chi Minh City in 1997 to about 1.2 million new motorcycles, nearly 2 million cars in 2001, in 2002 nearly 2.5 million motorbikes. On average the number of motorcycles in the municipalities of our country each year increased about 15-18%, the number of cars each year increased about 8-10%.
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