Symbols, causes, hazards and protection of smog
Smog, the collective name for fog and haze. But fog is fog, haze is haze, and the difference between fog and haze is very big.
Haze means haze (haze). Dust, sulfuric acid, nitric acid, etc. in the air that cause visual impairment are called haze. The difference between haze and fog is that the relative humidity is not large when haze occurs, while the relative humidity in fog is saturated (if there are a large number of condensation nuclei, the relative humidity may not necessarily reach 100% before saturation may occur).
Sulfur dioxide, nitrogen oxides and respirable particulate matter are the main components of smog. The first two are gaseous pollutants, and the last particulate matter is the culprit that aggravates haze weather pollution.
From a certain perspective, there is a big difference between fog and haze.
For example: when fog occurs, the air is humid; when haze occurs, the air is relatively dry, and the relative humidity of the air is usually below 60%. The reason for its formation is the phenomenon of air mixed erosion due to a large number of extremely fine dust particles, smoke particles, salt particles, etc. floating evenly in the air, making the effective horizontal visibility less than 10KM. The symbol is "∞".
The diurnal changes in haze are generally not obvious. When there are no major changes in the air mass and the air mass is relatively stable, it will last for a long time, sometimes lasting more than 10 days. Weather phenomena such as haze, light fog, sandstorms, blowing sand, floating dust, and smoke are all caused by a large number of extremely fine dust particles floating in the air
The dangers of haze
Haze Weather also has a serious impact on human cardiovascular and cerebrovascular diseases. It will hinder normal blood circulation, lead to cardiovascular disease, hypertension, coronary heart disease, cerebral hemorrhage, may induce angina pectoris, myocardial infarction, heart failure, etc., and cause chronic bronchitis to appear in the lungs. Source of heart disease, etc.
In addition, when the pressure is relatively low in dense fog, people will feel irritable and their blood pressure will naturally increase. On the other hand, the temperature is often lower in foggy days. Some patients with high blood pressure and coronary heart disease suddenly walk from warm indoors to cold outdoors. The blood vessels expand and contract with heat, which can also increase blood pressure, leading to stroke and myocardial infarction.
Protective measures
Wear a mask when going out, go out as little as possible, and wash exposed skin immediately after returning from going out?
Close doors and windows at home, and pay attention to hygiene. Moisturize. It is necessary to ensure the hygiene of the room. Hygiene is very important in haze weather, otherwise it is easy to cause respiratory diseases. Cleaning the room does not provide a breeding ground for germs. Secondly, it is necessary to moisturize and ensure the relative humidity of the room, so that floating dust can easily settle and adsorb in the room. Try to use a wet rag to wipe the dust off the floor to avoid being inhaled into the respiratory tract.
Eat a light and reasonable diet, eat more lung-cleansing foods, such as black fungus porridge, pig blood spinach soup, etc.
Drink water frequently and don’t stay up late
It is easy to cause Cardiovascular disease, should the elderly cancel morning exercises?