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Fine dust is dust with a diameter of 10 micormets. Fine dust PM2.5 is tiny dust particles with a diameter of 2.5 micrometres or less. These microscopic dust particles can penetrate human cells, destroy self-defense and immune mechanisms from within cells causing a number of acute respiratory diseases.
In addition, they also make important organs such as the lungs, heart, brain … poisoned, increasing the risk of death in people with lung cancer and heart disease.
Super fine dust size PM 2.5 compared to a hair.
In a recent study of fine dust PM2.5, scientists found evidence that PM2.5 could “invade” into cells and be toxic to the respiratory system, they found. Black carbon particles can absorb and carry metal ions into the lungs.
According to statistics in China, 183 people die every hour from smog, about 4,300 people die every day, and 1.6 million people every year.
According to a GreenID report at the end of 2016, there are times when PM2.5 dust in Hanoi is 50.5µg / m3, twice as high as the national standard (25 µg / m3), and 5 times higher than with the average annual threshold as recommended by the WHO (10µg / m3).
How dangerous is PM2.5 fine dust?
PM2.5 fine dust destroys the body’s immune cells
Self-sustaining cells are a type of self-defense mechanism of the body, they will digest harmful substances that enter the body.
Black carbon particles, a component in fine dust PM2.5, when entering the body, will carry a large amount of metal ions into the white blood cells, destroying the self-balancing mechanism inside the cell, creating toxicity.
Absorbs many harmful substances into the body
PM2.5 has a very small size and a large total surface area, so they easily absorb pollutants in the air, making their toxicity stronger and also more harmful than other fine dust like PM10.
When the toxin in the dust enters the human body, it damages the alveolar wall of the lung, the alveoli loses its elasticity and holds air, causing the lungs to store air – one of the symptoms and manifestations of obstructive pulmonary disease. Chronic (COPD) cannot be cured.
PM2.5 entering the bloodstream can cause a heart attack
Fine dust has the ability to damage important organs of the body.
PM2.5 can enter the trachea and bronchi, even the end bronchus and blood, causing very bad health effects, even affecting the nervous system or creating an embolism, causing acute myocardial infarction.
In addition, the toxic substances in the dust can also cause anemia or damage to the heart muscle.
PM2.5 may be the cause of brain degeneration
Professor Barbara Maher and his colleagues at Lancaster University, UK have discovered that a large number of nano-iron particles in the brain do not come from the human body but from the external environment (i.e. Air pollution). Professor Barbara Maher thinks that human brain degeneration can be caused by these nanoparticles.
How to protect children from air pollution?
We often wear masks and glasses in the hope that we can limit dirt in the polluted air. But the truth is, masks can only partially block PM10 dust. PM2.5 ultra-fine dust is much smaller in size than PM10.
Therefore, in order to protect children from air pollution, parents should avoid letting children go out during traffic rush hours, limit children’s exposure to cigarette smoke. You can monitor the air condition according to this guide. AirVisual is the most accurate way to measure air pollution to know when the local fine dust concentration is high and limit out at that time.
Regularly let children contact green plants and fresh natural environment during weekend picnics to balance their body.
Give children plenty of green vegetables, fruits rich in vitamin A, vitamin C and beta-carotene such as butter, sweet potatoes, carrots, papaya, broccoli, animal liver, fish, eggs, milk … to enhance immune system.
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