What does smog mean? What are the characteristics?

Haze, also known as haze and ash haze, refers to the turbidity phenomenon formed by the suspension of a large number of particles such as unexplained smoke and dust. The core substance of smog is dust particles suspended in the air, which are called aerosol particles in meteorology. In recent years, the occurrence frequency of "smog" weather phenomenon is getting higher and higher, which leads to the gradual deterioration of air quality. Haze contains hundreds of atmospheric chemical particles.

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With the improvement of economic development level in China, more and more cities are affected by smog, especially megacities. Giving priority to smog control has become the key work of the China municipal government, and only by preventing and controlling smog in groups can smog be effectively controlled.

20 16 12, the most persistent smog weather since winter is affecting China, and many cities have been seriously polluted. Beijing, Tianjin, Hebei, Shanxi, Shandong, Henan and other provinces and cities have joined forces to "fight smog". It is estimated that the smog will last for 4 days, and it will weaken and dissipate from north to south after 2 1 until midnight.

19 will enter the worst period of this round of smog at night, and areas including Beijing-Tianjin-Hebei, Shanxi, Shaanxi, Henan, etc. 1 1 provinces and cities will be shrouded in smog.

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