Air pollution, especially acid rain from the past several years has become an increasingly big challenge and attracted the concern of the whole world in General and Vietnam in particular. Measures to reduce acid rain are widely applied in Vietnam but besides that still scares some inadequacies. Vietnam is a developing country should work to minimize the use of fossil energy in the production process is very difficult, in the fossil fuel often contains a sulfur, also in the air has a lot of Nitrogen gas In the combustion process can be ... born out of the gas Sulphur dioxide (SO2), nitrogen dioxide (NO2). The solubility of this gas with water vapor in the air to form particles of acids (H2SO4), nitơric acid (HNO3). When it rains, this acid particles dissolve in rain water, do the pH of rain water falling. Besides, due to the limited funding that the industrial zone are not eligible for the exhaust gas processing equipment after the process of fuel combustion. Control of emissions from the vehicles haven't closely, 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, children. In Vietnam at present, about 75% of the number of cars powered by gasoline fuels, 25% of the number of cars powered by vegetable oil, 100% gasoline motorcycle, at the intersections in major cities of infected air CO gasoline, steam (HC) even infected with lead (Pb). Dioxide emissions standards to the atmosphere of Vietnam is not in excess of 400mg/m3, SO2 standard is no more than 0.3 mg/cm3, but the management of the amount of gas emissions through lax standards should reduce the US acid rain in Vietnam is still difficult. The people in the countryside of our country often cooking with wood, straw, grass, leaves and a small percentage of cooking with coal. In particular the use of activated carbon honeycomb in cooking will born dioxide. In some families the condition they use gas instead of coal use honeycomb or kerosene stoves cause less air pollution than coal, the cooking oil. In contrast, due to the price of oil and the price of electricity reliability increased dramatically, many low income families have switched to using coal stove with large numbers of hives, on average each family consumes about 2 kg of coal/day. The prohibition of people use coal or oil to cooking is impossible, so controlling the amount arising from the cooking process many inadequacies.
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