How is smog formed? What are the hazards of smog?
2022-08-05 06:08:23
Smog is our biggest weather problem now. Many people know that smog is wearing a mask, the weather is gloomy, and there are small particles in the air. So what are the hazards of smog? How is smog formed? The following is a brief introduction to the smog.
Fog refers to the weather phenomenon in the atmosphere due to the condensation of suspended water vapor and the visibility is less than 1 km. The formation of ash is mainly caused by the combination of a large number of particles suspended in the air and meteorological conditions. There are three reasons for the formation of haze weather:
1. The phenomenon of static wind increases in the horizontal direction.
2. Inversion temperature appears in the vertical direction.
3. Increase in suspended particulate matter in the air.
With the growth of urban population and industrial development, motor vehicles soared, pollutant emissions and suspended solids increased significantly, leading directly to reduced visibility. In fact, dust smog is also generated in the home decoration. The indoor dust is diffused, which not only harms the health of workers and users, but also increases the cleaning burden. When the dust is serious, it also brings many hidden dangers to the decoration project.
In addition to meteorological conditions, industrial production, motor vehicle exhaust emissions, winter heating and coal burning, etc., the concentration of particulate matter in the atmosphere (including coarse particulate matter PM10 and fine particulate matter PM2.5) increases, which is an important factor in the production of haze. Nowadays, the emission levels of pollutants in many cities are at a critical point, which is very sensitive to meteorological conditions. Air quality can reach the standard when the diffusion conditions are good. Once adverse weather conditions are encountered, air quality and visibility will decline rapidly.
1. Injured lung
The haze day has the greatest impact on the respiratory system, which has become the consensus of most people. The respiratory system is most exposed to the external environment, and the contact area is large. Hundreds of atmospheric particles can directly enter and adhere to the upper and lower respiratory tract and lungs of the human body, and most of them will be inhaled by the human body. Secondly, the haze weather causes the near-surface ultraviolet rays to weaken, which tends to increase the activity of the bacteria in the air, and the fine particles will "carry" bacteria and viruses to the depths of the respiratory system, causing infection.
2, hurt the heart
The Harvard School of Public Health has demonstrated that particulate contaminants in haze can cause not only myocardial infarction but also myocardial ischemia or damage. The United States surveyed 25,000 people with heart disease or poor heart and found that after PM2.5 increased by 10 μg/m3, the patient mortality rate increased by 10% to 27%.
3, wound blood vessels
In the haze, there are many pollutants in the air, and the air pressure is low, which is easy to induce an acute attack of cardiovascular disease. When the fog is heavy, the water vapor content is very high. When people are outdoors and exercising, the sweat is not easily discharged, causing people to have chest tightness and high blood pressure. Moreover, the foggy weather pressure is relatively low, and people will have an irritating feeling, and the blood pressure will naturally increase. In addition, foggy weather tends to be low. Some patients with high blood pressure and coronary heart disease suddenly go from warm indoors to cold outside. The blood vessels expand and contract, which can also increase blood pressure, leading to stroke and myocardial infarction.
4, hurt the skin
The skin also has a breathing function. In clean air, the skin will be comfortable and moisturized, but if it is in a dirty environment, the skin will be very uncomfortable.
5, hurt the brain
The smog not only damages the organs, but also affects the nervous system invisibly. Zhong Nanshan once said that the 65th Annual Geriatrics Association of the United States will have a conclusion that the PM2.5 in the air will increase by 10 micrograms per cubic meter, and the brain function of human beings will age for three years.
6, the genital urinary system
The effect of smog on semen quality is mainly manifested in the later stage. The inhalable substances in the smog enter the human blood circulation and gradually accumulate in various organs of the human body, including the scrotum of the semen factory. In addition, because the genitourinary system is the fastest metabolizing tissue in the human body, when the particles inhaled by the outside enters the human blood circulation, the first thing to be affected is the genitourinary system, which causes some genitourinary system diseases such as renal failure and uremia. , less sperm, sperm deformity, benign prostatic hyperplasia.
The above is the smog hazard and the related knowledge of the cause of the smog brought to you by the decoration house. I hope that everyone can take more precautions after understanding these and not be hurt by smog! For more related knowledge, please pay attention to life encyclopedia!
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