Is the air quality good in foggy days?

Poor quality The reasons for poor air quality in foggy days are as follows:

1. Fog is a small droplet formed by the liquefaction of water vapor in the air, and some pollutant particles in the air will adhere to the small droplet, thus polluting the air.

2. Fog is not conducive to the diffusion of pollutants, making it difficult for pollutants such as waste gas and smoke in cities to dissipate, thus leading to the deterioration of urban air quality.