It refers to the haze layer close to the surface in a lot of dust, soot, salt powder and other impurities floating in the air, the visibility is less than 10 kilometers, according to the monitoring of the environmental quality standards.PM is greater than or equal to 10 micron particles which can usually be blocked in the nasal cavity, PM between 2.5 microns and 10 micro meters not only can enter the upper respiratory tract, but also can be excreted or blocked by the internal nasal hairs by sputum, PM less than 2.5 microns is not easy to be blocked,go directly into the bronchi and alveoli, causing asthma, bronchitis and cardiovascular disease.
The haze may come from elsewhere with the wind drift, and also by local impurity accumulations. Haze concentration generally increased with the height, in the inversion layer below the worst visibility. In space ,there exists several layers of haze. Haze in the air relative humidity is below 80% in general.
The haze that was from inhalation will be deposited in the alveoli, the alveolar deposition was dissolved into the blood, hemoglobin oxygen ability damage, easy to cause blood poisoning. The part that has not been dissolved is absorbed by the cell, and the cell is damaged easily. Other harmful substances such as sulfur dioxide in the haze are mainly to stimulate the human respiratory tract, the greater harm to people. When the haze is serious, the contaminants in the impurities can cause the central nervous system lesions, causing pulmonary edema or chronic bronchitis, especially when people breathe into the lungs, it can lead to severe emphysema and lung cancer.
Chemical smoke haze, when the concentration reaches a certain limit, it will causes harm to skin, eyes and respiratory tract. In the haze of carbon monoxide, when its concentration is 900PPm, headache and eye contact 1 hours will be sluggish; when the concentration is 1200PPm, Touching 1 hours will be nerve palsy, life-threatening. Carbon oxide haze, the human eye, nose and respiratory tract have a strong stimulating effect, under certain conditions,it can affect the liver and and the function damage of the stomach and cardiovascular system.
In addition, the haze will affect the moods of people, because the weather is dim dark, the body of the pineal gland secrete more melatonin, the concentration of thyroxine, epinephrine is lower. Thyroxine and epinephrine are hormones, when arouse cells work once reduced, "lazy", the cells will become inactive, it will appear in the blues.
The haze days, not all of us can't go out.It is impossible to have wrapped dumplings, for some sports enthusiasts, such as weather to reduce outdoor sports, if you want to exercise, you can choose more lush trees, where the negative oxygen ions in a large amount, harm of relatively small. For some such as hypertension, heart disease, chronic lung disease, allergies, asthma patients need extra attention, take the necessary protection, in addition to wearing surgical masks qualified.The most effective way is to be attached to our body's haze be cleaned in time.
At home,you must do the things as follows: washing gargle, cleaning up the nasal cavity to prevent the harm of haze on the human body; Washing your face with warm water is best, it can be attached to the haze particles in the skin effectively clean; gargle is designed to remove dirt attached to the mouth; the key is to clean up the nasal cavity, many people do not know how to clean, to teach you a simple method: wash hands with warm water, with the nose, the water gently and quickly blew his nose, repeating several times, dirty things all cleaned up the nasal cavity. It is worth noting that, when cleaning the nasal cavity, be sure to gently absorb water. Avoid choking cough.
Parents clean up the nasal cavity in children, and you can use a clean cotton swab dipped in water, repeating cleaning.
Indoor smoking Environmental protection organizations released a survey report which shows that in the absence of smoking provisions of the restaurant's average PM 2.5 concentration is about 2 times the total ban on restaurants.
In the case of incomplete combustion, the cigarette will produce a lot of tiny particles suspended in the air, and the harmful substances will be attached to the fine particles, which is the main component of tobacco smoke. Most of these particles are only about 1 micron in diameter, belonging to the category of PM2.5. Tobacco smoke contains more than 7000 compounds, including 69 carcinogens and 172 kinds of harmful substances.
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