Can I run outdoors in foggy weather?

The answer is yes, but not recommended.

Haze is a kind of air pollution, and it is a general manifestation of excessive suspended matter content in the atmosphere. Among them, PM2.5 (particulate matter with aerodynamic equivalent diameter less than or equal to 2.5 microns) is considered to be the "culprit" causing haze weather.

Fine particles are small in particle size and rich in a large number of toxic and harmful substances, which have a long stay in the atmosphere and a long transportation distance, seriously affecting human health and atmospheric environmental quality.

The smaller the particle size, the deeper it enters the respiratory tract. Particles with a diameter of 10μm are usually deposited in the upper respiratory tract, and those below 2μm can penetrate bronchioles and alveoli. After fine particles enter the alveoli, they directly affect the ventilation function of the lungs, making the body vulnerable to hypoxia.

Long-term exposure to PM2.5 can lead to cardiovascular diseases, respiratory diseases and lung cancer. When the concentration of PM2.5 in the air is higher than 10 μ g/m3 for a long time? 3; It will increase the risk of death. Every time the concentration increases 10 μ g/m3? 3; The total risk of death increased by 4%, the risk of death caused by heart and lung diseases increased by 6%, and the risk of death caused by lung cancer increased by 8%. In addition, PM2.5 is easy to adsorb organic pollutants and heavy metals such as polycyclic aromatic hydrocarbons, which significantly increases the probability of carcinogenesis, teratogenesis and mutation.