In winter, the smog in the country is getting more and more serious. What factors are related to this phenomenon?

In winter, there will be smog all over the country, especially in northern China. Haze weather is a pollution state, which is the name of the air state after all kinds of suspended substances in the atmosphere exceed the standard. Fog is actually the condensation of water vapor hidden in autumn and winter, and the visibility is low in foggy days, but smog is a combination of dust, sulfuric acid, nitric acid and other compounds in the air, which is more harmful.

Smog weather is mostly related to particulate matter in the air. When the particulate matter reaches a certain concentration, the smog begins. Generally, a lot of coal is used in winter, and smog begins. Secondly, motor vehicle exhaust, waste gas produced by human activities will also be related to smog days, and climate reasons will also have a certain impact.

First of all, coal is used. In spring and summer, the weather is warmer and there is less smog. In autumn and winter, with the cold weather, coal began to be used. In autumn and winter, coal stoves burn in the countryside. Some self-heating communities also use coal, and the exhaust gas generated by insufficient coal combustion is directly discharged into the air. Almost every household in northern rural areas will have an exhaust pipe for coal stoves in winter, which exhausts all day. It may be a little less at a time, but it must be 10 million.

Motor vehicle exhaust is also a cause of smog weather, but compared with coal burning, the impact is still slightly smaller, but the fine particles emitted by large diesel vehicles have a great impact, so metropolises like Beijing have taken measures to control motor vehicle emissions and slow down pollutant emissions.

Climate will also have an impact. The establishment of high-rise buildings reduces air mobility, and the particulate matter in the atmosphere is not easy to dilute and gather, which has an impact. In addition, the reduction of green plants in recent years is also part of the reason for the haze weather.

Moreover, the smog weather is very harmful, and it is also a great challenge to human health, especially to the respiratory tract. Haze weather has low visibility and has a great impact on travel safety.