What is the range of cloudy weather today?

This weather phenomenon is called ~

Haze is an atmospheric turbidity phenomenon formed by aerosol particles such as dust, sulfuric acid, nitric acid and organic hydrocarbons in the air, which makes the horizontal visibility less than 10 km. Haze is a kind of disastrous weather, which is harmful to health. Inhalation of excessive dust or smoke particles floating in the air will damage cardiopulmonary function, which may lead to death in the long run. 1952 London smog caused more than 4,000 deaths.

Suggestion: Go out as little as possible before the air gets better, and remember to wear a mask when going out.