What are the causes of haze weather? Haze and its prevention.

What are the causes of haze weather? What are the hazards and prevention of smog?

Lead: Due to the serious air pollution in most cities in China, smog weather occurs every autumn and winter. Haze weather is very harmful to people, so what harm does smog do to people? How can we prevent it? Today, the weather network will introduce you to the harm and prevention of smog; What is the cause of haze weather? Let's have a look.

Due to the serious air pollution in most cities in China, smog weather occurs every autumn and winter.

What is the cause of haze weather?

Fog refers to the weather phenomenon that the visibility is lower than 1 km due to the condensation of suspended water vapor in the atmosphere. The formation of smog is mainly the result of the interaction between a large number of suspended particles in the air and meteorological conditions. There are three reasons for the smog weather: 1, and the phenomenon of increasing static wind in the horizontal direction. 2. There is an inversion in the vertical direction. 3. The increase of suspended particles in the air.

With the growth of urban population and industrial development, the number of motor vehicles has soared, and the emissions of pollutants and suspended solids have increased greatly, which directly leads to the decline of visibility. In fact, dust "smog" will also occur in home decoration, and indoor dust is pervasive, which is not only harmful to the health of staff and users, but also increases the cleaning burden. When the dust is serious, it will also bring many hidden dangers to the decoration project.

In addition to meteorological conditions, the increase of atmospheric particulate matter (including coarse particulate matter PM 10 and fine particulate matter PM2.5) caused by industrial production, vehicle exhaust emissions and coal burning in winter is an important factor of smog. At present, the level of pollutant discharge in many cities is at a critical point, which is very sensitive to meteorological conditions. When diffusion conditions are good, the air quality can reach the standard, and once adverse weather conditions are encountered, the air quality and visibility will drop rapidly.

Smog weather has an important impact on roads, railways and human health.

Hazards of smog

1, affecting life

Haze weather has an important impact on roads, railways, aviation, shipping, power supply systems and crop growth. Fog and haze will cause air quality decline, affect the ecological environment and bring great harm to human health.

2. Affect traffic

Due to the poor air quality and low visibility in foggy days, rear-end collision accidents are prone to occur, which will affect the normal traffic order and have no change in everyone's travel. We should pay more attention to the road conditions in our daily driving to avoid danger.

Smoke and smoke prevention

1, reduce going out

The elderly, children and people susceptible to respiratory diseases with weak resistance should try to reduce going out or outdoor activities, and wear masks to protect their bodies when going out to prevent pollutants from invading the lungs through the nose and mouth. After returning from going out, you should immediately wash your face and expose your skin.

Step 2 close the doors and windows

Because the pollutants in the air are difficult to dissipate in foggy days, doors and windows should be closed in foggy days to avoid outdoor fog entering the room to pollute the indoor air and induce acute respiratory and cardiovascular diseases.

Step 3 pay attention to your diet

Patients with chronic respiratory diseases, especially the elderly, should keep scientific life rules, avoid overwork and drink plenty of water. Pay attention to a light diet, eat less irritating food, eat more tofu, milk and other foods, and supplement vitamin D when necessary.