Is there smog in Tongzhou?

Tongzhou Meteorological Observatory issued a yellow warning signal of haze in April, 2023 1 1 7: 31:Due to the influence of dust transmission in the north, it is expected that there will be floating dust and moderate haze weather in towns (streets) in our district from evening to night.

Haze is mainly composed of sulfur dioxide, nitrogen oxides and inhalable particles. The harm of smog to people can be divided into short-term and long-term effects. Short-term effects may include severe reactions such as cough, expectoration, chest tightness and shortness of breath. Large particles such as PM 10 generally stay in the upper respiratory tract and can be coughed out of the respiratory tract by coughing. Small particles such as PM2.5 will be deposited in the lungs and cannot be physically discharged by coughing or drugs. It can induce pulmonary fibrosis, affect respiratory function, and lead to long-term effects such as emphysema, chronic bronchitis and bronchial asthma. Therefore, we should do a good job of protection, do not smoke, try to stay away from second-hand smoke, open windows less in foggy days, and use air purifiers indoors. Stay outdoors for a long time, wear a mask to prevent PM2.5, and wash your face, hands and mouth when you get home. You can use a cotton swab dipped in tap water or normal saline to clean the nasal cavity. During the haze season, symptoms such as dry throat and cough may occur. It is recommended to drink more water. Automobile exhaust is harmful not only to people who stay on the roadside for a long time, but also to the driver himself, so it is best to drive less. When there is a traffic jam for a long time, turn off the engine and open fewer windows.