Traditional Culture Encyclopedia - Weather inquiry - Why is there foggy weather in Beijing?

Why is there foggy weather in Beijing?

In cities with dense fog, there are many particles in the air, including bacteria and viruses, which are irritating to patients with a history of respiratory diseases and even to the respiratory tract of healthy people. Listen to the escape mask to remind you to reduce unnecessary outdoor activities, or wear a mask before going out to prevent poisonous fog from invading your lungs through your nose and mouth.