When it comes to air quality, it feels like it s getting worse?

The main causes of air quality are natural factors and human factors. The former is caused by natural causes, such as volcanic eruptions, forest fires, etc.; The latter is based on industrial waste gases, transportation, combustion of domestic stoves, and dust from the groundFor example, the reason for purchasing materials will emit a certain odor, including formaldehyde, benzene, TVOC and other harmful gases will have a certain impact on the room!

Air pollution is a complex phenomenon and air quality is affected by many factors at a given time and place.

There are two main factors that affect air quality: the emission of pollutants and the ability of the atmosphere to diffuse. The amount of pollutant emissions from human activities is only one of the reasons that affect air quality.

Generally speaking, when the pollution source is relatively stable, the diffusion, migration, flow and transformation of pollutants in the atmosphere are closely related to the meteorological conditions at that time, and meteorological factors such as wind direction, wind speed, temperature inversion and precipitation play an important role in the diffusion of pollutants. For example, when there is precipitation or wind, it is often conducive to the dispersion of pollutants in the air; On the other hand, when there is fog or wind, it is often prone to increased air pollution.

I don't really like it in the summer because it's hot and makes people feel irritable. But I have a little bit to look forward to this summer.

This expectation is brought to me by the bright new product of Hisense fresh air conditioner。 In a broad sense, I'm one of the designers of brilliant new products. Because at the beginning of the design of the bright new product, the needs of consumers are integrated into the product concept, so that consumers become the indirect designers of the bright new products.

In the face of this summer, I think it is wonderful. Hisense Fresh Air Conditioner helped me solve the problem of heat and heat.

Truth be told, the air quality is really getting worse and worse. Dr Maria Nella, Director of WHO's Department of Environment, Climate Change and Health, said that after surviving the pandemic, there are still seven million preventable deaths and countless preventable years of health loss due to air pollution, which is unacceptable, yet too much investment is still being made in polluted environments rather than clean, healthy air.

Yes. Ways to prove that air has weight:

1. One balloon is inflated, and the same other is not inflated, and placed on both sides of the scale; You know that air has weight, and the inflated side is heavy.

2. Tie the balloon with a rubber band, let the balloon go vertically, and then measure the length of the rubber band with a ruler; Then inject air into the balloon, also tie it with rubber and go vertically downward, measure the length, the latter method measures the length of the rubber band longer than the previous one, indicating that the air has mass.

3. Fill enough air in two plastic bottles, close the caps, and place them at both ends of the balance to balance the scale. If the lid of one of the bottles is opened, the air in this bottle decreases, and the balance is unbalanced, proving that the air also has mass.

Introduce. Air refers to the mixture of gases in the earth's atmosphere, for which air belongs to the mixture, which is mainly composed of nitrogen, oxygen, noble gases (helium, neon, argon, krypton, xenon, radon, gas O), carbon dioxide and other substances (such as water vapor, impurities, etc.).

Among them, the volume fraction of nitrogen is about 78%, the volume fraction of oxygen is about 21%, the volume fraction of noble gases (helium, neon, argon, krypton, xenon, radon) is about, the volume fraction of carbon dioxide is about the latest data), and the volume fraction of other substances (such as water vapor, impurities, etc.) is about.

Air has mass, you think air has no mass, you can't measure it, it's because air is buoyant. To put it simply, water has mass, and everyone agrees on this estimate. You fill a plastic bag with some water, place it at the left end of the scale, and put the balance and the water bag in the sink.

It will be found that the balance does not measure the mass of the water, as if the water has no mass! This is because water is buoyant, so the balance cannot measure the mass of water, and in order to measure the mass of air, it needs to be measured in a vacuum using "gravitational force".

The weight of air per 1 cubic meter is kilograms. The weight of 100 cubic meters of air is kilograms. Air is a mixture of many gases.

Its constant components are noble gases such as oxygen, nitrogen, argon and neon, and its variable components are carbon dioxide and water vapor, the amount of which varies slightly in the air to a very small extent depending on the location and temperature of the Earth.

Air has mass, but the human body cannot perceive it.

The density of air is, air is matter, matter is made up of molecules, molecules are made up of atoms, atoms have mass, so air has mass.

The constant components of air are noble gases such as oxygen, nitrogen, argon and neon, and the variable components are carbon dioxide and water vapour, the content of which varies slightly in the air within a small range depending on the geographical location and temperature.

The air is colorless, odorless, and gaseous. The density of air at 0 and one standard atmosphere (PA) is cubic meters. The state of a gas at 0 and one standard atmosphere is called the standard state, and air in the standard state can be considered as an ideal gas with a molar volume.

Air occupies a certain space, air can be compressed, and compressed air is elastic. 1000 ml of air above the ground is about equal to grams.

A: Air facts should have mass.

Yes, we just don't feel it.

The real-time ranking of the cities with the worst air quality in the country on February 1, 2023 is as follows:

1. NewChangji Prefecture, Xinjiang

The air quality rating is severe, 277 gm. Changji Hui Autonomous Prefecture, an autonomous prefecture under the jurisdiction of Xinjiang Uygur Autonomous Region, is located at the northern foot of the Tianshan Mountains, the southeast edge of the Junggar Basin, the terrain is high in the south and low in the north, inclined from southeast to northwest, belonging to the middle temperate zone, and is a typical continental arid climate. Changji, take the meaning of "prosperity and auspiciousness".

2. Urumqi City, Xinjiang

The air quality rating is severe, 268 gm. Urumqi, referred to as Urumqi, is the capital of Xinjiang Uygur Autonomous Region, the political, economic, cultural, scientific and educational, financial and transportation center of the whole region, a transportation and communication hub connecting the north and south of Xinjiang and connecting Chinese mainland with Central and Western Asia and Europe, the second Eurasian land bridge, the bridgehead of western China and an important gateway for China's opening to the west, the sixteenth emerging city in Chinese mainland in terms of comprehensive strength, and the largest city in the five Central Asian countries.

3. Wujiaqu City, Xinjiang

The air quality grade is severe, 212 g m. Wujiaqu City is located at the northern foot of the Tianshan Mountains in the central part of Xinjiang Uygur Autonomous Region, the southeast edge of the Junggar Basin Core Wideland, and is connected with Changji City and Urumqi City.

4. Guang'an City, Sichuan

The air quality grade is severe, 192 g m. Guang'an, a prefecture-level city in Sichuan Province. Located in the northeast of Sichuan Province, it is bordered by Dianjiang County, Changshou District, Suifu District and Hechuan District of Chongqing City in the east and south, Pengxi County of Suining City and Jialing District and Gaoping District of Nanchong City in the west, and Peng'an County of Nanchong City and Qu County and Dazhu County of Dazhou City in the north.

Guang'an is the only Sichuan-Chongqing Cooperation Demonstration Zone in Sichuan Province and the closest prefecture-level city to the main urban area of Chongqing, and is included in the Chongqing 1-hour Economic Circle.

5. Shihezi, Xinjiang

The air quality rating is severe, 159 gm. Shihezi, also known as Shicheng and Shicheng, belongs to the Xinjiang Uygur Autonomous Region, located in the middle of the northern foot of the Gaiqueliang Tianshan Mountain and the southern part of the Junggar Basin, with a total area of 6,007 square kilometers and 6 sub-districts (towns, communities (villages), with a population of 720,000 as of 2022. In 2021, it was commended as a model city for the construction of healthy cities in various provinces in 2020.