What harm does haze bring to humans?

First, it affects physical health. The composition of haze is very complex, including hundreds of atmospheric particulate matter. Among them, the main ones harmful to human health are aerosol particles with a diameter of less than 10 microns, such as mineral particles, sea salt, sulfate, nitrate, organic aerosol particles, etc., which can directly enter and adhere to the upper and lower respiratory tract and lung lobes of the human body. Since most of the atmospheric aerosols in haze can be inhaled by the human respiratory tract, especially submicron particles will be deposited in the upper and lower respiratory tracts and alveoli respectively, causing rhinitis, bronchitis and other diseases. Long-term exposure to this environment will also induce Lung cancer. In addition, since ultraviolet rays from the sun are the only way for the human body to synthesize vitamin D, the weakening of ultraviolet radiation directly leads to a high incidence of rickets in children. In addition, ultraviolet rays are the main weapon used by nature to kill atmospheric microorganisms such as bacteria and viruses. The haze weather leads to the weakening of ultraviolet rays near the ground, which can easily increase the activity of infectious germs in the air and increase the number of infectious diseases.

The second is the impact on mental health. Gray weather can easily make people feel pessimistic. If not adjusted in time, it is easy to lose control.

Third, it affects traffic safety. When haze weather occurs, outdoor visibility is low, pollution continues, traffic is blocked, and accidents occur frequently.

Fourth is the impact on regional climate. Regional extreme climate events are frequent and meteorological disasters occur one after another. What is even more worrying is that haze also accelerates the early arrival of photochemical smog pollution in cities. Photochemical smog is a kind of light blue smog. Car exhaust and factory exhaust contain a large amount of nitrogen oxides and hydrocarbons. Under the action of sunlight and ultraviolet light, these gases will undergo photochemical reactions to produce photochemical smog. Its main components are a series of oxidants, such as ozone, aldehydes, ketones, etc., which are highly toxic and have a strong stimulating effect on the human body. In severe cases, it can cause difficulty in breathing, vision loss, twitching of hands and feet, etc.