How is the smog formed? How do children cope with smog weather?

Fog is an aerosol system consisting of a large number of tiny water droplets or ice crystals suspended in the air near the ground. It mostly occurs in autumn and winter (which is also one of the reasons for the large-scale haze weather in China in June 20 13), and it is the product of water vapor condensation (or condensation) in the near-surface air. The existence of fog will reduce air transparency and worsen visibility. If the horizontal visibility of the target drops below 1000 meters, the weather phenomenon of water vapor condensation (or condensation) suspended in the air near the ground is called fog.

Haze (mái), also known as haze (smog), dust, sulfuric acid, nitric acid, organic hydrocarbons and other particles in the air can also make the atmosphere turbid. The phenomenon that the horizontal visibility of the target is 1000 ~ 10000 meters is called light fog or mist. When fog is formed, the atmospheric humidity should be saturated (if there are a large number of condensation nuclei, the relative humidity may not reach 100%, and saturation may occur). Because the light scattered by fog composed of liquid water or ice crystals has little to do with wavelength, the fog looks milky white or bluish white and gray.

Haze weather is a state of air pollution, and smog is a general term for all kinds of suspended particles in the atmosphere, especially PM2.5 (particles with aerodynamic equivalent diameter less than or equal to 2.5 microns) is considered to be the "culprit" causing haze weather. With the deterioration of air quality, cloudy days are increasing and the harm is increasing. In many areas of our country, the smog weather phenomenon is combined with fog as an early warning and forecast of disastrous weather. Collectively referred to as "haze weather".

Children should pay attention to smog weather:

First, pay attention to the ventilation time of the room. Many people know to open the window for ventilation, especially many parents turn on the air conditioner to take their baby to sleep at night, and pay more attention to ventilation. But in foggy days, it is not recommended to open the window for ventilation in the morning and evening. Better wait until the sun comes out.

Second, pay attention to hygiene and moisturizing. To ensure the hygiene of the room, it is very important to be hygienic in foggy days, otherwise it will easily lead to respiratory diseases, and cleaning the soil that will not breed germs; Secondly, it is necessary to moisturize the room to ensure the relative humidity, so that floating dust can easily precipitate and adsorb on the ground, and try to wipe the dust with a wet rag to avoid being inhaled into the respiratory tract.

Third, the baby should reduce outdoor activities. It is best not to take your baby for outdoor activities in foggy days, especially in the morning when the air quality is particularly poor. It is best to wait until the visibility is high, where there are many trees and grass. In addition, don't take your baby to activities in crowded places. Many people are prone to cross-infection and cause diseases. Diet: light and eat more vegetables. The negative ion vitamin C machine which can generate negative air ions is a good choice for people to purify the air effectively. Eat more carrots, bean sprouts, tomatoes, kelp and cabbage to ensure the intake of vitamins, which also has a good preventive effect on smog.

Fourth, give your baby a reasonable diet, drink plenty of water, and supplement vitamin D. After PM2.5 enters the human body through breathing, the respiratory tract is the first to be affected. Drinking more water is the key to prevent respiratory diseases; In addition, give your baby more foods that clear the lungs, such as black fungus porridge, pig blood spinach soup, etc. In foggy days, due to the decrease of sunshine, insufficient ultraviolet radiation for children, insufficient production of vitamin D in the body, and greatly reduced absorption of calcium, rickets in infants and young children will be seriously caused, which will slow down the growth and development of children. Pay attention to vitamin d supplementation.