Why can a cold front dispel smog?

One of the main reasons for haze weather is that there is no wind or the wind is very small, which is not conducive to the diffusion of pollutants. When pollutants accumulate for a long time under static meteorological conditions, haze weather is formed.

When the cold front crosses the border, the horizontal air movement is obvious and the wind is strong, which is conducive to the diffusion of pollutants and the smog will dissipate. When traveling in foggy weather, do a good job of protection, and remember to bring the American Puweixin mask before going out, which is good for your health.