How to write a total score copy about the harm of smog to people

In the past, meteorological departments often used PM 10 as an indicator to monitor air pollution, and PM2.5 could be directly inhaled into the lungs. Because of its strong penetrating power, it is more harmful than PM 10. PM2.5 "ultrafine dust" mainly comes from motor vehicle exhaust dust, fuel dust, sulfate, cooking fume dust, building cement dust, coal dust and nitrate, and is an important part of harmful fine particles in smog.

Meteorologists and medical experts believe that smog weather caused by fine particles is even more harmful to human health than sandstorms. Particles with a particle size larger than 10 micron will be blocked outside the human nose; Particles with a particle size of 2.5 microns to 10 microns can enter the upper respiratory tract, but some of them can be excreted through sputum and blocked by villi inside the nasal cavity, which is relatively harmless to human health; However, fine particles with a particle size less than 2.5 microns are not easily blocked. When inhaled into the human body, it will directly enter the bronchus, interfere with the gas exchange in the lungs, and cause diseases including asthma, bronchitis and cardiovascular diseases.

Dust entering alveoli can be quickly absorbed, directly enters the blood circulation without liver detoxification, and is distributed all over the body, which impairs the ability of hemoglobin to transport oxygen. It may have serious consequences for patients with anemia and blood circulation disorders. For example, it will aggravate respiratory diseases and even cause heart diseases such as congestive heart failure. These particles can also enter the blood through bronchi and alveoli, and harmful gases and heavy metals are dissolved in the blood, which is more harmful to human health. The physiological structure of human body determines that it has no ability to filter and block PM2.5, but the harm of PM2.5 to human health has gradually exposed its horrible side with the progress of medical technology.

In EU countries, PM2.5 has reduced people's average life expectancy by 8.6 months. PM2.5 can also be a carrier of viruses and bacteria, which is helpful for the spread of respiratory infectious diseases. At present, the major developed countries in the world and Japan, Thailand and India in Asia have listed PM2.5 in the air quality standards.

Fog has always been called a "killer", and pollutants such as industrial waste gas, automobile exhaust, dust in the air, bacteria and viruses in the air are attached to these water droplets. In daily life and travel, these substances will have an impact on the human respiratory tract, easily causing acute upper respiratory tract infection (cold), acute tracheobronchitis, pneumonia and asthma attacks, and inducing or aggravating chronic bronchitis. According to experts' analysis, toxic substances in the atmosphere adsorbed by PM2.5 are absorbed by the human body after entering the respiratory tract, and the impact on the body is all-round. Fog is composed of invisible water droplets, while haze is composed of invisible particles and flying dust, which is very harmful to health.

In the past 30 years, the public smoking rate in China has been declining, but the prevalence of lung cancer has increased by more than four times. At present, it is generally believed that this may be related to the increase in haze days. Many people compare the smog weather to the "smoking room" of nature. Not only foggy days with very low visibility will have an impact on human health, but also foggy days and cloudy days will have the same problem. Hazy days also have a serious impact on cardiovascular and cerebrovascular diseases, which will hinder normal blood circulation, lead to cardiovascular diseases, hypertension, coronary heart disease, cerebral hemorrhage, and may also induce angina pectoris, myocardial infarction and heart failure. And cause pulmonary heart disease in chronic bronchitis. Can the wind blow away the smog or solve the industrial pollution? Qixin people fight smog and protect the environment. You still have to wear a mask when you go out in foggy weather. Puweixin has Tmall imported from the United States, which can effectively filter pm2.5