What are the condensation conditions of wet air? Further elaborate the causes and influencing factors of haze weather.

Fog is a natural phenomenon, which is formed when the relative humidity is high in the morning or at night, and has nothing to do with human pollution. Haze is caused by particulate pollutants such as dust, sulfuric acid, nitric acid and organic hydrocarbons in the air. The main difference between them lies in the relative humidity of the air. When the relative humidity is greater than 90%, it is called fog, and when the relative humidity is less than 80%, it is called haze. The humidity between the two is called smoke. Due to the continuous deterioration of air quality and frequent haze, many domestic weather forecasts predict haze weather together with haze weather and become haze weather. 2. Analysis of the causes of smog ① The phenomenon of still wind in cities is increasing. Smog mostly occurs in cities. The rapid development of the city makes a large number of high-rise buildings appear. When the wind flows through these tall buildings and is resisted, the wind will weaken. This is the phenomenon of still wind. When the wind weakens, the suspended matter in the city is not suitable for diffusion, so it accumulates in the city. ② There is an inversion layer in the vertical direction. Inversion phenomenon refers to the fact that the upper temperature is lower than the lower temperature, which makes the vertical movement of the lower temperature of the atmosphere unable to proceed normally, resulting in the suspension in the air being blocked from moving upward and staying in the lower part. ③ The suspended particles in the air increased. Urban population growth, industrial development, rapid increase of motor vehicles and pollutant discharge all lead to a large increase in suspended solids. Smog weather is caused by natural factors, and more is human factors. Man-made pollution discharge is the main cause of smog. The soluble part of pollutants will condense with floating dust and then mix to form particulate matter. Under the weather conditions with high relative humidity, these particles will absorb the water vapor in the wet air and grow bigger and bigger until people can directly observe the large particles with the naked eye, which will reduce the visibility and then form the haze weather that people can clearly see. It must be said that sustainable development is very important to our country, and eliminating smog is also realizing people's wishes.

Haze caused by smoke

① Effects on respiratory system. There are many complex particles in the composition of smog, and a large number of particles with a diameter less than 10 micron have the ability to directly enter the human body through breathing. These particles attach to human respiratory tract and lungs, which can cause rhinitis, bronchitis and other diseases. For people with such respiratory diseases, the appearance of smog will undoubtedly aggravate the condition and lead to further deterioration. Studies have shown that even if healthy people live in a smog environment for a long time, they will increase their chances of developing lung cancer. ② Influence on cardiovascular system. Smog will hinder the normal blood circulation of human body, lead to cardiovascular diseases and increase the risk of illness, such as coronary heart disease, hypertension and other symptoms. In severe cases, it may even lead to myocardial infarction, cerebral hemorrhage, heart failure and other diseases. 3 harm to children's growth. When children grow up, they need a certain amount of ultraviolet radiation to produce vitamin D in their bodies to promote the absorption of calcium. Haze has a blocking effect on ultraviolet rays, so it is extremely unfavorable to children's growth and development and brings great harm. ④ Harm to mental health. Some psychologists have pointed out that smog weather gives people a feeling of depression, and people will have unhealthy psychological induction.