The three most polluted cities in Shandong

Heze City, Jinan City and Zibo City have been the hardest hit areas of smog, and the smog this year is much more serious than last year. As the provincial capital, the pollution sources of smog are also rich, and it is relatively difficult to control. Although the light rain continues, the haze weather has not improved.

Pollution refers to the phenomenon that substances harmful to human beings or other organisms are mixed into the natural environment, the quantity or degree of which reaches or exceeds the environmental carrying capacity, thus changing the normal state of the environment.