Why is Hebei Expressway always foggy?

Hebei Expressway is always foggy for the following reasons:

1, Hebei is located in North China, with Taihang Mountain in the west, which is sheltered from the wind all the year round and is easy to cause foggy weather.

2. Hebei's industry is unreasonable, and there are many iron and steel plants in Hebei, which belong to the industrial structure of heavy industry, causing environmental pollution and easily causing atmospheric weather.

3. The proportion of thermal power is too high, and the proportion of thermal power in Hebei is over 90%. Photovoltaic conditions are general, and wind power is limited to northern Hebei such as Zhangjiakou and Chengde. Power generation burns too much coal.

4, heating loose coal combustion in winter. The smog in the north is heavier than that in the south, largely because of heating in winter.