Haze also went out for a run some time ago, and I don't know if it will cause permanent damage.

Short-term injury has a great influence on sensitive people with weak constitution. Generally speaking, it is not suitable for outdoor sports for a long time in foggy days.

The World Health Organization identified air pollution as "carcinogenic to human beings" for the first time, and regarded it as a universal and major environmental carcinogen. This statement was issued by the International Agency for Research on Cancer under the World Health Organization. The International Agency for Research on Cancer in Lyon, France, said in its report that there is sufficient evidence that exposure to outdoor air pollution will lead to lung cancer and the risk of bladder cancer will increase accordingly. Experts from this institution held a week-long meeting, reviewed more than 1000 latest works from research institutions on five continents around the world, and finally made a determination.

China Academy of Social Sciences and China Meteorological Bureau jointly issued the Green Paper on Climate Change, which reported that smog weather affects health, which not only aggravates diseases of respiratory system and heart system, but also affects reproductive capacity. At present, the most direct harm of smog to human health is mainly to increase the incidence of respiratory diseases. Hazy weather has an acute impact on health, mainly manifested as symptoms of upper respiratory tract infection, asthma, conjunctivitis, bronchitis, eye and throat irritation, cough, dyspnea, nasal congestion and runny nose, rash, cardiovascular system disorder and other diseases. The incidence/hospitalization rate of respiratory diseases has increased. In addition, smog weather will have some indirect effects on human health. Haze will weaken ultraviolet radiation. If smog often occurs, it will affect the synthesis of vitamin D in human body, lead to a high incidence of rickets in children and enhance the activity of infectious bacteria in the air. Smog weather will also affect people's mental health, making people depressed and pessimistic.

Photochemical smog, a by-product of smog, can be said to have accumulated highly toxic carcinogens, which is the most harmful to human health.

At present, the only reference standard to prevent this kind of fine particles is GB2626 industrial protection standard, which is formulated with reference to American standard N95/N 100, and the protection effect of fine particles between PM0.07 and PM5 can reach more than 90%. The purchase of masks must depend on whether there is a quality and safety mark QS mark or safety protection certification LA. If there is no national standard and QS is a fake and shoddy cottage product, it is impossible to stop fine particles. This kind of products generally won't get wet, so they can't be cleaned. Disposable masks need to be discarded after wearing for 4- 10 hours, because bacteria will multiply rapidly (the so-called antibacterial masks on the market are all gimmicks, which are all false propaganda after testing).