What is the relationship between excessive pm2.5 index and severe haze weather?

Is smog and PM2.5 the same thing, and how to protect it?

What is PM2.5?

People who know the number "PM2.5" for the first time may be ignorant, and they don't know what it means. In fact, PM is the abbreviation of English Particulatematter, which is changed from the initial letter to PM, which actually refers to particulate matter, while 2.5 represents the floorboard of solid particles or droplets with a diameter less than or equal to 2.5 microns in the air. Because the particles are relatively small, we can't see them with the naked eye. Maybe you still can't understand the meaning of 2.5 microns. Here, let me give you an analogy. The diameter of human fine hair is generally 70 microns, which is nearly 30 times more than PM2.5. Do you have a general impression in your mind?

Where does PM2.5 come from?

The main components of PM2.5 are elemental nitrogen, organic carbon compounds, sulfate and nitrate. There are other elements rich in the earth's crust such as sodium, magnesium, calcium, aluminum and iron, and heavy metal elements such as lead, zinc, cadmium and copper, which are mainly caused by human pollution. Although the spontaneous combustion process will also produce PM2.5, the main sources are man-made emissions, such as the burning of coal, gasoline and diesel, the burning of garbage, road dust, industrial pollution, forest fires, pollen bacteria and so on.

How did the sky smog appear?

In fact, large and small particles in the daily air will reduce daily visibility, but compared with coarse particles, fine particle PM2.5 has a stronger ability to reduce visibility. When visibility decreases, we will be blocked, blurred, unclear, etc. And it will also hinder the light irradiation.

Harm to human health?

Large particles are easily intercepted by the nose, throat and trachea, or excreted by the movement of villi. However, because PM2.5 is a fine particulate matter, once inhaled from the respiratory tract, it will deposit in human alveoli and then dissolve into the blood, causing blood poisoning and easily reaching the depths of the lungs. It will cause damage to the respiratory system and cardiovascular system, such as respiratory irritation, cough, dyspnea, exacerbation of asthma, arrhythmia, heart disease and so on.

Haze weather's harm to traffic safety?

When there is haze weather, due to poor air quality and low visibility, it is easy to have a rear-end collision, which affects the normal traffic order and cannot change everyone's travel. We should observe the road conditions more during daily driving to avoid danger.

How to deal with smog weather?

1 Try not to go out: due to the existence of large and small particles in foggy days, which is seriously harmful to health, particles will attach to the respiratory tract after entering the body, causing bronchitis and pharyngitis. In particular, the elderly and patients with respiratory diseases with relatively weak resistance should reduce their travel, or wear masks to protect their bodies when exercising outdoors.

There should be a limit to morning exercises: many people are used to morning exercises. In fact, time is not very correct for the human body. Due to the air exchange environment in the morning, the air quality is very poor, especially in foggy days, the respiratory tract is easily stimulated, and it is easy to induce respiratory tract and cardiovascular and cerebrovascular diseases during exercise.

Do a good job of personal hygiene, wash your face and rinse your mouth after going out, and change clothes when going out to remove the residue of pollution.

4. Pay attention to diet:

Drink plenty of water to speed up your metabolism.

B In diet, we should try to avoid the intake of spicy food, and there should be as few people who like to eat hot pot in winter as possible.

C light diet, eat more fresh fruits and vegetables, tremella, pears, persimmons, lilies, radishes, water chestnuts and other lung-moistening foods.