What does PM2 5 mean? I can t understand the weather forecast!

Refers to particulate matter in the atmosphere that is less than or equal to a micron in diameter, 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. On September 9, 2012, the monitoring center of the Beijing Municipal Environmental Protection Bureau said that the new version of the air quality release platform was launched on January 1, 2013. On October 6, 2012, all 35 monitoring stations in Beijing were released online.

The higher the value, the worse the air pollution.

Respirable particulate matter and total suspended particulate matter in urban air quality** or weekly reports are two of the most familiar air pollutants.

Inhalable particulate matter, also known as PM10, refers to particulate matter with a diameter greater than microns, equal to or less than 10 microns, which can enter the human respiratory system; Total suspended particulate matter is also known as PM100, i.e. particulate matter with a diameter of 100 microns or less. Hopefully, thank you.

The analysis on this is more complete and you can read it below.

But even if we close the doors and windows, the smog will quietly enter through the cracks in the windows. It is best to install the Shenghuan fresh air system, which can not only isolate the intrusion of smog, but also install the fresh air system to attract the dirty air from the indoor to the outside. Shenghuan Fresh Air is an anion product jointly developed by Shandong Abel and Tsinghua University.

It effectively removes the following fine dust and has a health care effect on the human body.

PM is an acronym for particulaitematter, and scientists use PM to represent the total amount of particulate matter per cubic meter of air, with higher values representing greater air pollution. It is the aerodynamic particle matter with an aerodynamic diameter of less than or equal to microns called fine particulate matter, also known as particulate matter that can enter the lungs, and its diameter is less than 1 20 of the thickness of a human hair, but it is rich in toxic hail and has substances that quietly harm the source of amur, which is the main cause of haze pollution.

What should be done to reduce the dose?

1) The construction excavation face is covered with a dust net, and the dust is reduced by sprinkling water. (2) Do not burn straw, etc. (3) Reduce the use of private cars, promote the use of public transportation, and green travel.

4) Reduce smoking and avoid the harm of secondhand smoke. (5) Eat less barbecue and fried food at high temperatures. (6) Do not burn fireworks and firecrackers.

7) Advocate planting more plants and advocating green life. (8) Care about the reform of high-energy-consuming and polluting industries, such as petrochemical industry and steelmaking industry.

PM Chinese means particulate matter, which refers to particulate matter in the atmosphere that is not larger than microns, also known as particulate matter into the lungs. Refers to the aerodynamic, equivalent nuclear grinding of particulate matter in the ambient air with a diameter of less than or equal to microns. It can be suspended in the air for a long time, and the higher its concentration in the air, the more serious the air pollution.

Although it is only a small part of the Earth's atmospheric composition, it has an important impact on air quality and visibility, among other things. <

PM Chinese means particulate matter, which refers to particulate matter in the atmosphere that is not larger than microns, also known as particulate matter into the lungs. Refers to aerodynamic, equivalent particulate matter in ambient air with a diameter of less than or equal to microns. It can be suspended in the air for a long time, and the higher its concentration in the air, the more serious the air pollution.

Although it is only a small part of the Earth's atmospheric composition, it has an important impact on air quality and visibility, among other things. Compared with coarser atmospheric particulate matter, the particle size is small, the area is large, the activity is strong, and the residence time in the atmosphere is long, and the transportation distance is long, so the impact on human health and atmospheric environmental quality is greater.

Introduction

PM is the abbreviation of English particulatematter, which is translated into Chinese as particulate matter. Refers to particulate matter in the atmosphere that is less than or equal to microns in diameter, sometimes referred to as particulate matter that enters the lungs. Most of the smog we see is caused by it.

Although the content in Da Cheng Chang Qi is very small, due to its small mass, long time to carry viruses and harmful substances, diverse transmission channels, long distances, and greater harm to the human body, it is indeed a veritable hidden killer!

hazards

According to some data, the number of deaths caused by pollution in Beijing and Shanghai in 2010 was 2,349 and 2,980 respectively, far higher than the number of traffic accident deaths in Beijing and Shanghai.

A chart from NASA in the United States shows that China's content even once surpassed the Sahara Desert, becoming a veritable country of virtue and fog.

Summary. Long-term exposure to high concentrations increases the risk of cardiovascular disease, respiratory disease, cancer, and other diseases. Therefore, it is one of the important indicators of air pollution, and it is also the focus of environmental protection departments and the public.

What is it. Hello Kiss refers to the mass of particulate matter in the atmosphere with a diameter of less than or equal to microns, also known as fine particulate matter. These particulate matter are mainly produced by human activities and natural factors, such as coal burning, vehicle exhaust, industrial emissions, and dust source storms. Due to its small diameter, it can penetrate deep into the cells of the human respiratory tract and cause dangerous damage to human health.

Long-term exposure to high hail concentrations increases the risk of cardiovascular disease, chiral respiratory disease, cancer and other diseases. Therefore, it is one of the important indicators of air pollution, and it is also the focus of environmental protection departments and the public.

It is particulate matter that can enter the lungs.

There are many kinds of air pollutant factors, and the current PM10 index is used by China's environmental protection department when monitoring environmental air pollutants. It is defined as monitoring the concentration of dust or drifting dust in ambient air with an air equivalent diameter of 10 m in ambient air.

Its diameter is less than 1 20 of the thickness of a human hair. Although it is only a small component of the Earth's atmosphere, it has an important impact on air quality and visibility.

Compared with coarser atmospheric particulate matter, 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 the health of the body and the quality of the atmospheric environment.

The main cause of haze:

As a major cause of haze weather, WHO has pointed out that the risk of death increases by about 15 μg at an average concentration of 35 micrograms per cubic metre compared to 10 micrograms per cubic metre. Studies have also shown that higher concentrations are associated with higher rates of respiratory and cardiovascular diseases.

The harm to the human body is so serious, but most people are kept in the dark and do not get the corresponding tips and guidance to take effective precautions to avoid this harm, this reality is obviously contrary to the duty of public service and the spirit of information disclosure.

What is it.

Dear, hello, for you to find out what is, is a kind of particulate matter that can enter the lungs, particulate matter diameter microns, although it is a very small component of the earth's atmosphere, but it greatly affects air quality, air visibility, and then affects people's lives. Contains harmful substances, which not only affect air quality, but also affect human health. Every time there is a haze weather, you can see many people wearing masks on the road, they are all preventing haze and large particles, so as to avoid the impact on the body.

Epidemiology has shown that it increases the risk of respiratory diseases and cardiovascular diseases, and there are also studies that show that it also affects the body's immune system and nervous system.