What is smog? What color is smog?

smog is a combined word, which is formed by mixing the words of fog and haze. This disastrous weather phenomenon is common in cities, and many areas in China are gray, and serious areas even affect vision. So what is smog?

what is smog

fog: it is an aerosol system composed of a large number of tiny water droplets or ice crystals suspended in the air near the ground, and it is the product of water vapor condensation in the air near the ground. The existence of fog will reduce air transparency and worsen visibility.

Haze: It is composed of dust in the air, smog weather graphic symbols, smog weather graphic symbols, sulfuric acid, nitric acid, organic hydrocarbons and other particles. It can also make the atmosphere turbid, blur the vision and worsen the visibility.

smog: it is a state of air pollution, and smog is a general expression of the excessive content of various suspended particles in the atmosphere. In many areas of China, haze weather phenomena are combined with fog as a warning and forecast of disastrous weather. Collectively referred to as "haze weather".

causes of haze

human factors: human activities will produce a large number of harmful gases and particles, which is a major cause of haze. Common factors that can cause haze are: automobile exhaust, substandard industrial gas discharge, coal burning in winter in northern China, dust from construction sites, etc.

natural factors: many factors in nature can also cause smog, such as the increase of static wind in the horizontal direction, inversion in the vertical direction and the increase of suspended particles and organic pollutants in the air.

Haze

Fog: Fog seems mild, but it contains more than 2 kinds of fine particles and toxic substances harmful to human body, including acids, alkalis, salts, amines, phenols, dust, pollen, mites, influenza virus, tuberculosis, pneumococcus and so on.

Haze: The diameter of fine and powdery floating particles in haze is generally below .1 micron, which can directly enter bronchi and even lungs through respiratory system. Therefore, the biggest impact of haze is the human respiratory system, and the diseases caused are mainly concentrated in respiratory diseases, cerebrovascular diseases, nasal inflammation and so on.

smog protection

Old people: Old people must stay at home in foggy weather, just exercise indoors, and avoid going out to exercise. Cooking food at home is mainly based on cooking, so as to reduce the oil smoke generated by frying.

Children: Children's physical development is not complete, and smog is harmful. In foggy weather, children should avoid going out, learn more about smog and strengthen their awareness of self-protection.

pregnant women: pregnant women must not go out in foggy weather, so they are suitable for resting at home, and pay attention to supplementing the relative humidity at home.

outdoor activists: people who work outdoors need to pay attention to wearing masks when going out, and wear gas masks when necessary, especially traffic police, sanitation workers and construction workers.