How to write an essay on pm2 5, essay on pm2 5

If I think of it, do I still ask?

Each person inhales an average of about 10,000 liters of air per day, and the fine dust that enters the alveoli can be quickly absorbed and directly enter the blood circulation and distribute to the whole body without liver detoxification. Second, it impairs the ability of hemoglobin to deliver oxygen, resulting in loss of blood. For patients with anemia and circulatory disorders, there can be serious consequences. For example, it can aggravate respiratory diseases and even cause heart diseases such as congestive heart failure and coronary arteries.

In short, these particles can also enter the blood through the bronchi and alveoli, and the harmful gases and heavy metals in them are dissolved in the blood, which is more harmful to human health. The physiological structure of the human body determines that there is no ability to filter or block, but the harm to human health has gradually exposed its terrifying side with the progress of medical technology.

Wei Fusheng, an academician of the Chinese Academy of Engineering and former chief engineer of the China Environmental Monitoring Station, also showed that the higher the PM10 concentration, the higher the incidence of respiratory diseases in children and their parents, and the impact was particularly significant.

If all of them are elementary school essays, China is definitely the world's number one power. Let me first let you know what is meant by particulate matter in the atmosphere with a diameter of less than or equal to microns, also known as particulate matter that can enter the lungs. Although it is only a small component of the Earth's atmosphere, it has important implications for air quality and visibility.

The particle size is small, rich in a large number of toxic and harmful substances, and the residence time in the atmosphere is long, and the transportation distance is long, so it has a greater impact on human health and atmospheric environmental quality. In February 2012, *** agreed to issue a newly revised "Ambient Air Quality Standard" to add monitoring indicators. In June 2012, Wu Xiaoqing, vice minister of environmental protection, said he hoped that individual embassies in China would stop disseminating data in China.

Elementary school students can't write at all! Let's talk nonsense.

First of all, what do we need to understand?

Scientists use the unit of g·m-3 (micrograms per cubic meter) to express the amount of such particles per cubic meter of air, and the higher this value, the more severe the air pollution.

How did it come about?

It is converted from oxides of sulfur and nitrogen. These gaseous pollutants are often caused by the burning of fossil fuels (coal, oil, etc.) and garbage. In developing countries, coal burning is the main way to heat and energy in homes**.

Diesel cars without advanced exhaust gas treatment devices are also particulate matter**.

Indoors, secondhand smoke is the main source of particulate matter**. Particulate matter is incompletely combustible and therefore produces particulate matter that is seriously harmful as long as it is burned by tobacco products.

So, how to prevent harm to the human body?

Wearing a mask with real prevention is an effective means. This is especially true on commuting to and from work, in subway stations, and in places with high crowds.

I use a mask of the proof. In addition to being dustproof and anti-dust, the mask fabric is made of Kanglun fiber, which can kill "superbugs" that even antibiotics can't kill. In the incessant breathing, the particles are mixed with a large number of pathogenic bacteria, and after being inhaled, it directly harms the health of the human body.

The use of masks undoubtedly effectively solves the problem of preventing dust and disease.

Try to minimize smoking or even not smoking. There is a large amount of smoke, which can be directly and indirectly harmful to the human body. If you can't stop people around you from smoking, you should try to stay away from smoke.

You can't exercise in the morning on foggy days. It is one of the important culprits that cause foggy weather, so when you wake up in the morning and find that the fog is relatively large, it is not appropriate to go out for morning exercise. If you must exercise in the morning, it is recommended to wear a mask that can really prevent it for jogging, trotting and other morning exercises with little exercise.

What is?

Generally, particulate matter in the air that is less than or equal to microns is called particulate matter that can enter the lungs, also known as: Its diameter is less than 1 20 of the thickness of human silk. Although particulate matter is only a small component of the Earth's atmosphere, it has important implications for air quality and visibility.

Compared with the coarser atmospheric particulate matter, the particle size of the particulate matter that can enter the lungs is small, rich in a large number of toxic and harmful substances, and the residence time in the atmosphere is long, and the transportation distance is long, so it has a greater impact on human health and atmospheric environmental quality.

Medical studies have shown that the smaller the particles, the greater the harm to human health. In general, particles larger than 10 microns in diameter are kept out of the nose. Particulate matter between microns and 10 microns in diameter can enter the respiratory tract, but with spitting, spraying.

The sneeze is partially excreted; However, fine particles with a diameter of less than microns will smoothly pass through the lower respiratory tract, and particles smaller than microns can enter the alveoli and enter the human blood vessels through the exchange of qi and blood. And this is the key to the greater harm to human health.

What are the health hazards? What diseases can occur?

More harmful to health than sandstorms, the currently known effects of fine particulate matter on human health mainly include:

1 Tracheitis 2 Asthma 3 Pneumonia (respiratory diseases) 4 Heart disease (coronary heart disease, congestive heart failure) (heart system disease) 5 High blood pressure 6 Anemia (blood system disease).

Diseases caused:

Pathogenic viruses take a "free ride" into the body to cause cancer.

Affects fetal development into defects.

Particulate matter can enter blood vessels through the exchange of air and blood.