What behaviors have potential safety hazards in foggy days?

Due to the severe haze weather, heavy fog has brought technical safety hazards to railway power grid and driving, and also affected people's health, normal travel and inconvenience. At the same time, it also led to the closure of expressways and the delay or cancellation of some import and export flights. There has been a long queue on the expressway and passengers are stranded at the airport. It is understood that smog is harmful to the human body after being inhaled into the human respiratory tract, which can lead to death in serious cases. Obviously, the smog weather has affected people's life safety and brought security risks to the transportation department.

(Tips: Puweixin imported from the United States can reduce smog inhalation when traveling in Daijing @ Dongyou)