PM2.5 refers to the particles with diameter less than or equal t2.5 microns in the atmosphere, and its diameter is less than 1 / 20 of the thickness of human hair. Medical experts believe that the particles with diameter less tha2.5 microns are equivalent to 1 / 10 of the size of human hair, and are not easy to be blocked
when PM2.5 is inhaled into human body, it is easy to cause diseases including asthma, bronchitis and cardiovascular disease. The main source of PM2.5 is the residues from combustion in the process of daily power generation, industrial production and automobile exhaust emission< How to prevent PM2.5
1. Hiding at home is the second choice. 1n severe pollution, the symptoms of patients with heart disease and lung disease will be significantly aggravated, and the symptoms of healthy people will also be common. Reducing going out is the most effective way for self-protection, especially for those with cardiovascular and cerebrovascular diseases, respiratory diseases, children and the elderly
when staying at home, be sure not to open windows and avoid opening windows for ventilation. 1f you really need to open the window for ventilation, you should try to avoid the morning and evening haze peak hours. You can open a seam of the window for ventilation, and the time should be half an hour at a time