How serious is the smog in Shijiazhuang?

Haze is a special weather phenomenon. Non-aqueous substances such as dust, sulfuric acid, nitric acid and organic hydrocarbons in the air make the atmosphere turbid, blur vision and worsen visibility. If the horizontal visibility is less than 10000 meters, it will cause sight distance obstacle.

Toxic and harmful substances in smog are very harmful to patients with respiratory diseases. Atmospheric fine particles mainly come from direct pollution sources and secondary generation of polluted gases. The direct emission of fine particles mainly comes from industrial production processes such as steel and cement, as well as dust. The so-called secondary fine particles are mainly the polluted gases emitted by pollution sources, such as sulfur dioxide, nitrogen oxides, ammonia and organic matter, which are produced under certain weather conditions. The formation mechanism of these particles is very complicated, which is the focus of current research. Sulfur dioxide mainly comes from coal combustion, and nitrogen oxides mainly come from high temperature combustion process. Whenever combustion occurs, nitrogen oxides will be produced. Such as burning coal, burning straw, burning garbage and so on. , will produce nitrogen oxides. Ammonia mainly comes from aquaculture, agricultural production, industrial production and natural emissions. In addition, sandstorms, cooking, barbecue and so on. It also has an impact. When cooking in the kitchen, such as cooking, the evaporation and combustion of oil at high temperature will produce harmful organic gases and particles. It has existed for many years, especially in heavy industrial cities. I just didn't realize it before, until PM2.5 was exposed and then spread through the Internet and media, we began to pay attention to smog.

20 13 smog is the key word of the year. As soon as the TV station reported it, everyone knew about it

Smog/haze (wámáI in English) is a combination of fog and haze. Smog is very common in cities. In many areas of China, fog and haze are combined as disastrous weather phenomena for early warning and forecasting, which are collectively called "haze weather".

Haze will do harm to people's health;

1. Effects on respiratory system. The composition of smog is very complex, including hundreds of atmospheric chemical particles. Among them, aerosol particles smaller than 10 micron are harmful to health, such as mineral particles, sea salt, sulfate, nitrate, organic aerosol particles, fuel, automobile exhaust, etc., which can directly enter and adhere to human respiratory tract and alveoli. In particular, submicron particles will be deposited in the upper and lower respiratory tract and alveoli respectively, causing acute rhinitis and acute bronchitis. For patients with chronic respiratory diseases such as bronchial asthma, chronic bronchitis, obstructive emphysema, and chronic obstructive pulmonary disease, smog weather will make the condition acute or acute. Staying in this environment for a long time will also induce lung cancer.

2. Influence on cardiovascular system. There are many pollutants in the air in foggy days, and the air pressure is low, which is easy to induce acute attacks of cardiovascular diseases. For example, when the fog is heavy, the water vapor content is high. If people exercise outdoors, the sweat of human body is not easy to be discharged, which causes people to feel chest tightness and blood pressure to rise.

3. Hazy weather will also lead to the weakening of ultraviolet rays in the surface layer, which can enhance the activity of infectious bacteria in the air and increase infectious diseases.

4. In foggy days, due to the decrease of sunshine, children's ultraviolet radiation is insufficient, vitamin D production in the body is insufficient, and the absorption of calcium is greatly reduced, which will seriously cause rickets in infants and children, and slow down the growth and development of children.

5. Affect mental health. The gloomy and foggy weather is prone to mental laziness, depression and pessimism due to the weak light and low air pressure, and even it is easy to get out of control at the slightest sign of trouble.

Minimize going out in foggy days. If you travel, you should be well protected. On this day, Puweixin, a cat imported from America, will help you reduce smog inhalation. I wish you a happy New Year!