Present situation of smog in China and its prevention and control countermeasures

Smog has always been a serious environmental problem in China, especially in the Beijing-Tianjin-Hebei region. Therefore, studying the current situation of smog in China is of great significance for arousing public awareness and promoting the proposal of control countermeasures.

At the beginning of 20 17, large-scale smog appeared all over the country, whether in western Xinjiang or in the eastern coastal areas. From 16 to 17, that is, during the peak period in Spring Festival travel rush, moderate smog appeared in the "Beijing-Tianjin-Hebei" area, Henan, Shandong, Shanxi, Shanxi, Northeast Plain and other areas, while ". However, due to the influence of smog, especially at the peak of Spring Festival travel rush, the visibility is low, which has a great impact on the traffic at the peak of Spring Festival travel rush. However, as far as Beijing is concerned, the number of days of heavy pollution in Beijing reached 39 days in 20 16, which was less than 20 13 of the first monitoring of PM2.5 19 days and 9 days less than the previous year. Among the 39 heavily polluted weather, the number of days when PM2.5 seriously exceeded the standard reached 38 days.

The main monitoring index of smog is PM2.5, which mainly refers to particles in the atmosphere with a diameter less than 2.5 microns that can enter the lungs. Severe smog will do great harm to human body, and it will also affect traffic and travel. More relevant statistics show that Xingtai was the most serious city of PM2.5 in China in 20 16. The annual average value of PM2.5 reaches 1, 3 1.4mg/m3, but according to China's PM2.5 standard, those exceeding 75 mg/m3 are lightly polluted. In 2065, 438+06, there were 36 lightly polluted cities and 3 heavily polluted cities. Through the above data analysis, we can find that the measures to control smog in China have been produced. But at the same time, there is also a problem, that is, PM2.5 is gradually decreasing, but heavy pollution still exists and smog weather is spreading. Therefore, it is necessary to find out the relevant measures to control smog.