What are the dangers of haze weather? What are the dangers of smog?

In many industrially developed places, air pollution may be more serious, so haze weather often occurs. Sometimes severe haze may have a great impact on traffic. There is indeed a lot of haze. Hazards, if staying in haze for a long time is still very harmful to the body, what are the hazards of haze weather? What are the dangers of smog?

1. Affects respiratory health

The composition of haze is very complex. The main health hazards are aerosol particles with a diameter of less than 10 microns, such as sea salt, sulfate, and nitrate. , fuel and automobile exhaust, etc., it can directly enter and adhere to the human respiratory tract and alveoli. The submicron particles may even be deposited in the upper and lower respiratory tract and alveoli, causing acute rhinitis and acute bronchitis. For patients who already have lung diseases, such as patients with chronic bronchitis, obstructive emphysema, chronic obstructive pulmonary disease and other chronic respiratory diseases, haze weather can cause acute attacks or exacerbations of the disease. If you stay in a haze environment for a long time, it may also induce lung cancer.

2. Affects the health of the cardiovascular system

The air in haze weather is polluted, with many harmful small particles, such as heavy metals, polycyclic aromatic hydrocarbons, etc., the air pressure is low, the oxygen content is reduced, and the The stimulation of high and low temperatures can easily lead to vasospasm, blood pressure fluctuations, increased heart load, headaches and other cardiovascular disease symptoms.

3. Affect calcium absorption

Hazy days will block sunlight and weaken ultraviolet rays near the ground. Without sunlight exposure, the human body cannot synthesize cholesterol in the skin. Vitamin D, which in turn affects the body's absorption and utilization of calcium and phosphorus. It is very detrimental to the growth of infants and young children who require large amounts of calcium.

4. Impact on traffic

The most direct harm of severe haze weather is low visibility, directly endangering the safety of roads, railways, aviation, shipping and other transportation, and prone to traffic jams, Traffic accidents occur and flights are delayed.

5. Affects mental health

I believe many people feel this way. They feel happy in sunny weather, but easily feel depressed in cloudy and rainy weather. Scientific research shows that haze weather has weak light and lower ambient air pressure, which can disrupt the human nervous system, making people lazy and depressed, causing pessimism, and making it easy to lose control when encountering unpleasant things.

6. Hindering outdoor fitness

There are many harmful fine particles in the air during haze weather, which is very detrimental to people with outdoor fitness habits, especially those in large and medium-sized cities. If you exercise in the morning in hazy weather, you may easily experience chest tightness, tightness of breath, elevated blood pressure, and easily induce cardiovascular and cerebrovascular diseases. Smog weather has cut off the way people in big cities can achieve health through outdoor exercise.

7. It is easy to cause the following diseases

1. Upper respiratory tract infection

Continuous haze weather covers more than 10 provinces across the country. A large number of harmful substances such as dust particles and smoke particles floating in the air can cause harm to the human respiratory tract. A large number of particles, dust, pollutant viruses, etc. floating in the air will irritate and destroy the respiratory mucosa and make the nasal cavity become swollen once inhaled by the human body. Dryness destroys the defense ability of respiratory mucosa and allows bacteria to enter the respiratory tract, easily causing upper respiratory tract infection.

2. Bronchial Asthma

During haze weather, the level of air pollution is heavier than usual, and bacteria and viruses are often contained in the air, which can easily lead to the spread of infectious diseases and the occurrence of various diseases. . In particular, air pollutants in cities are not easy to diffuse, which aggravates the toxicity of sulfur dioxide, carbon monoxide, nitrogen oxides and other substances, which will seriously threaten human life and health. During haze weather, dust and smoke float in the air, and dust mites may also be suspended in the mist. Bronchial asthma patients inhale these allergens, which will irritate the respiratory tract and cause asthma symptoms such as coughing, stuffiness, and difficulty breathing.

3. Lung cancer

Professor Kan Haidong from the School of Public Health of Fudan University said that the incubation period of lung cancer ranges from a few years to decades. Children at a young age are very likely to develop lung cancer. It may be related to genetic factors and gene mutations. However, compared with adults, children's height determines that they are indeed more affected by car exhaust and road dust. This is fully recognized by the medical community. Because children's breathing zone is just around the height of exhaust gases, and at the same time, children's respiratory exposure per unit weight is higher than that of adults, which makes them more susceptible, so they are more affected by pollution gases such as exhaust gases and smog. In addition, children's body organs are not fully developed, and the damage caused by pollution gas invasion is also greater.

4. Conjunctivitis

Experts say that particles in the air during haze days adhere to the cornea, which may cause corneal and conjunctivitis, or aggravate the patient's keratitis and conjunctivitis. . The number of patients with keratitis and conjunctivitis has increased significantly, including the elderly, children, and office workers who spend all day in front of computers. People experience much the same symptoms: dry eyes, soreness, stinging, redness, and irritation.