Sources of air pollution due to construction activity in our country works in construction of buildings, roads, bridges, ... very strong and takes place everywhere, especially in urban areas. The construction activities such as excavation backfilled, destroying old buildings, building materials spilled during transport, often causing severe dust pollution to the environment surrounding air, especially cell dust, dust concentration in the air in the home construction activity exceeded the standard values allowed up to 10-20 times. Sources of air pollution from cooking activities of people People in our rural areas usually wood burning, straw, grass, leaves and a small proportion of cooking with charcoal. People in the city often cooking with charcoal, kerosene, firewood, electricity and natural gas (gas). Cooking with charcoal and kerosene will emit a pollutant output significantly, particularly it is the main source of pollution for indoor air environment, directly affect the health of people. In recent years, many urban families use gas stoves instead of charcoal stoves or kerosene. The environment status report of the provinces in 2002, and in 2003, in large urban centers like Hanoi, Ho Chi Minh City, Hai Phong, Da Nang, especially in the cities and towns of the southern provinces, some higher-income families move from cooking with charcoal, to cooking oil with gas stove and more. Gas stove causing air pollution is much less compared to cooking with charcoal, oil. However, due to oil prices and electricity prices increased significantly, many families with low incomes have turned to firewood stove in large numbers, each family consumes about 2kg coal / day, air pollution caused locally heavy, especially at group and annealing coal stove.
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