Air pollution components

In ordinary daily life, everyone is familiar with writing. Writing can exercise our habit of being alone, calm our minds and think about our future direction. I believe many people will find writing difficult. The following is an air pollution composition I compiled for you. I hope it will help you.

Air pollution composition 1 Air pollution is very harmful to us and plants. Why do you say that? I discovered this through research. As for what kind of research it is, let me tell you slowly.

Planting some flowers and plants in the garden can not only beautify our home, but also purify the air around us and make the air we breathe fresher. So some people say that a garden with a certain scale is like a natural "oxygen bar", which can provide the fresh air we need without stopping working. But in recent days, I found that my natural "oxygen bar" went on strike. I can't breathe fresh air when I go to the yard every morning. What's going on here? What makes my natural "oxygen bar" ineffective? I'm determined to find the murderer!

In response to the above events, I consulted a lot of information and made a comprehensive observation of flowers, plants and leaves for several days. What I found most suspicious was the frequent traffic in recent days, which caused serious air pollution. In addition, due to the recent weak wind, the oil fume emitted by some nearby food stores can not be effectively dispersed, and it is excessively absorbed by flowers and leaves, resulting in the pores on the surface of leaves being blocked by dust particles and unable to "work". I consulted my science teacher, and he thought it was very possible. Let me go home and have a try. So I went back to collect some samples of flowers and plants, planted them indoors, basked in the sun regularly, and watered them encrypted. A few days later, compared with others, I found that the flowers and plants I carefully cared for grew much better than those outside. According to my experimental results, I encrypted the watering times to three times a day. After more than a week of painstaking efforts, the "natural oxygen bar" finally resumed normal work and provided us with fresh air every day.

To sum up, I come to the conclusion that the "natural oxygen bar" stopped working because of the increasingly serious air pollution around it, which made flowers and plants absorb excessive carbon monoxide, hydrocarbons, nitrogen oxides and suspended particles in the air, blocked the stomata used for photosynthesis in flowers and plants and leaves, and stopped working because of overload operation. Finally caught this "murderer"!

You see, this is the harm of air pollution. Air pollution actually hurts not only ourselves, but also many creatures on the earth and our mother earth ... Let's act together to reduce air pollution and protect our living environment!

Air Pollution Composition 2 Tell you something about air pollution today! Let me talk about the causes of air pollution first: there are two types of causes of air pollution: natural and man-made. Natural pollution is caused by natural causes (such as volcanic eruption and forest fire). ), and man-made pollution is formed by people engaged in production and life activities. In man-made pollution, it can be divided into fixed (such as chimneys and industrial exhaust pipes) and mobile (such as cars, trains, planes and ships). Due to the universality and frequency of man-made pollution, people pay more attention to it than natural pollution.

The harm of air pollution to human beings is as follows: there are three ways for human beings to suffer, that is, inhaling polluted air and contact with surface skin pollution, which will cause diseases and seriously take away human life. Harm to plants: Plant disease resistance declines, affecting growth and development, causing leaf spot or withering and death.

Let me talk about the precautions I think: don't drive a private car, take more buses and take more subways.

Air pollution component 3 Air pollution has a great influence on the climate. The pollutants discharged by air pollution will have a certain impact on the local and global climate, especially on the global climate. In the long run, this effect will be very serious.

The content of carbon dioxide in the atmosphere has increased;

Fuel contains all kinds of complex components, which will produce all kinds of harmful substances after combustion. Even if the fuel without impurities is completely burned, water and carbon dioxide will be produced. It is precisely because of fuel combustion that the concentration of carbon dioxide in the atmosphere is increasing, which destroys the balance of carbon dioxide in nature and may even trigger a "greenhouse effect", leading to an increase in the temperature of the earth.

The ozone layer is destroyed. The ozone layer is the best umbrella for the earth. It absorbs most of the ultraviolet rays from the sun. However, scientific research and atmospheric observation in the past two decades have found that the ozone layer in the Antarctic atmosphere is thinning every spring. In fact, there is an ozone hole in the polar atmosphere.

This phenomenon of ozone depletion is an abnormal phenomenon. Does this indicate that this ultraviolet absorption layer is in a global disaster? Through continuous scientific research, people have found that substances released by human social activities have seriously damaged the ozone layer. Of course, this phenomenon is also influenced by the unique meteorological conditions in this area (polar vortex, cold stratospheric temperature, polar stratospheric clouds).

acid rain

Some people think that acid rain is a silent crisis, the most serious environmental threat that has ever attacked us, and an invisible enemy. This is not an alarmist.

With the increase of industrialization and energy consumption, acid emissions are also increasing. They enter the air and form acid rain after a series of actions.

People have controlled the discharge of acid, but there is still acid rain. Atmospheric dust may be another cause of acid rain.

Drought:

Guangdong Province-In the second half of 20 ×××× years, a severe drought occurred in southern China, and Guangdong Province became the hardest hit area. Since June 10, 20 ××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××× The Greenpeace Climate Change Panel went north to Qingyuan, Ruyuan and Shaoguan along Guangzhou in early October of 65438+/kloc-0. Go deep into the arid hinterland of northern Guangdong, pursue the drought footprint and visit the source of drought. Fish ponds dried up everywhere, crops withered and the land cracked.

Air pollution constitutes today's earth. The water is not clear, the grass is not green, the flowers are not red and the sky is not blue. However, everything that happens here is "attributed" to us humans. Reducing air pollution, noise pollution and food pollution has become an urgent pursuit of mankind. However, today we will talk about traffic pollution in air pollution.

In today's society, more and more people own their own cars, and the traffic becomes crowded. Traffic jams and car rear-end accidents occur frequently, leading to many traffic accidents. However, the increase of cars also means the increase of tail gas and the serious pollution of the atmosphere.

Once, I saw such a story in an essay:

There is an old woman who has a lot of money at home. She has enough money to take a private car every day. She doesn't have to be crowded with so many people on the bus and is in danger of being knocked down, but she still insists on taking the bus every day. The driver was surprised and asked her, "Why do you squeeze the bus every day?" ? You have so much money. "She said with a smile," The car pollution is too serious, and there are too many exhaust emissions. " Suddenly, everyone in the car was shocked and cast an admiring look at the grandmother.

At this moment, we all understood grandma's good intentions, and she reduced air pollution with her own actions. She is an ordinary and great person. If each of us can start from ourselves like grandma, then we will get not only our own future, but also the future of our children and the future of the earth. Driving less, taking more buses and riding more bicycles have become effective ways to reduce air pollution.

The effective use of bicycles and electric vehicles can also reduce air pollution. However, the benefits of cycling go far beyond this. It can also help people exercise. Imagine how harmful it would be if 100 people owned their own private cars. Imagine again that if these 100 people switch to bicycles and electric cars, it will benefit all mankind.

Protecting the environment starts from you and me, from traffic, from taking buses and riding bicycles. Maybe just a small attempt will change a lot. Maybe in a few years, our water will be cleaner, the grass will be greener, the flowers will be redder and the sky will be bluer. ...

Liu Zhiquan, deputy director of the Science and Technology Standards Department of the Ministry of Environmental Protection, pointed out on the 5th that at present, about one-fifth of the cities in China have serious air pollution, and more than one-third of the air quality in 1 13 key cities cannot meet the national second-class standards, and motor vehicle emissions have become the main source of air pollution in some large and medium-sized cities.

Liu Zhiquan delivered a speech entitled "Strengthening the construction of motor vehicle environmental protection laws and regulations and promoting the sustainable development of motor vehicle industry" at the China International Development Forum of Automobile Industry.

Liu Zhiquan said that in recent years, China's automobile industry has developed rapidly and the number of automobiles has increased rapidly. The rapid development of automobile industry has promoted the rapid development of economy, promoted the overall progress of social economy and improved people's quality of life, but it has also brought serious air pollution. Some cities have changed from soot pollution in the past to motor vehicle pollution. The phenomenon of grey coal appears in some areas of China, and the visibility is obviously reduced. The research shows that the phenomenon of coal ash is obviously related to nitrogen oxides and hydrocarbons emitted by motor vehicles. The ozone concentration in some cities is gradually increasing, and the possibility of photochemical pollution in some cities is increasing. The increase of ozone concentration is closely related to nitrogen oxides and hydrocarbons emitted by motor vehicles.

Liu Zhiquan said that in the past decade, China's motor vehicle emission regulations have developed rapidly, constantly improving motor vehicle emission control standards, guiding and promoting low-carbon emission reduction of vehicles, and achieved certain results. The overall emission situation is slowing down, and the effect of emission reduction is obvious during the Eleventh Five-Year Plan period. It is estimated that compared with the 1980s, the number of motor vehicles in China has increased by 24 times, while the total emission has increased by 12 times.

Liu Zhiquan pointed out that during the Twelfth Five-Year Plan period, the state will further improve the vehicle emission standard system and strengthen vehicle emission control. The key point is to improve the emission level of motor vehicles, strictly implement the national emission standards for motor vehicles, improve the environmental protection system for newly produced motor vehicles, continue to promote the trade-in of vehicles, accelerate the elimination process of yellow-label vehicles and low-speed trucks, and actively develop new energy vehicles. In addition, it is necessary to improve the management system of motor vehicle environmental protection, strengthen the regular inspection of motor vehicle environmental protection, and study the tax and fee policies conducive to the prevention and control of motor vehicle pollution. At the same time, it is necessary to speed up the process of vehicle fuel cleaning and strengthen the management of vehicle fuel detergent.

Air pollution composition 6 "DuDu! There is a phone! " It turned out that Inspector Frog was having breakfast when his cell phone rang. Inspector Frog connected the phone and held it to his ear: "Hello, this is Frog Detective Agency. What can I do for you? " "Is it Inspector Frog?" There was a hurried voice from the mobile phone. "I'm Miss Rabbit from a city. We have demons here! " "Devil at work?" This is the first time detective frog has received such a call. "Miss rabbit, please don't get excited. Take your time. " "We can't help but get excited!" Another person's voice came through the phone. "Who are you?" Detective frog wants to know. "I'm Mr. Bach." We really have a monster here. Come and have a look. "

"Is it really that serious? Well, we will arrive soon! " Inspector Frog became nervous. "A city has arrived. This is probably blue smoke! " Inspector frog said very calmly.

As soon as Inspector Frog came out of the engine room, a cat policeman wearing a gas mask came towards him. Say, "Why don't you wear a gas mask?" "I just came here."

Inspector Frog covered his nose and said, "I'm here to investigate Blue Smoke ... Uh-huh ... Ahem ..."

At this time, Dr. Shenquan came. He took out a big glass bottle and tested the blue smoke. It turns out that these smog are colorless, but the composition is very complicated, mainly a mixture of toxic compounds such as aldehydes and ozone. He also said: "The air pollution here is quite serious, and the chimneys of various factories keep emitting exhaust gas. The nitrogen oxides and hydrocarbons contained in these waste gases will produce a series of chemical reactions under the irradiation of solar rays, thus forming blue smoke. I think we should find a way! " As soon as Dr. Shenquan finished speaking, he began to act.

Soon, a huge "monster" appeared in the air of a city: "I am the devil, my name is air pollution. When all people and animals see this "monster" floating in the air-air pollution, and know his name is air pollution.

Air pollution component 7 is healthy, surrounded and foggy, but it has everything, gas, impurities, absorption, toxicity, effort and fainting.

As we all know, fresh air is very important for health. No matter where you go, no matter what you do, you are always surrounded by gas, which we call an empty sea. If there are impurities in the air, they may absorb our bodies and make us sick. We need clean air, but unfortunately, air pollution is global at present, especially in cities.

There are many big cities, but there is no pollution. There are many factories in our city. We need to make food, clothes and other things. Every year, these factories emit hundreds of millions of tons of smoke into the air. Power plants burn coal and houses, which greatly aggravates air pollution. In addition, there are many automobile enterprises in this city. Once on the street, they will replace it with fresh air and toxic gases.

Our country is trying to prevent and control air pollution. As long as every citizen realizes its importance and makes efforts, one day people will soon have only fresh air. At that time, sunlight will no longer be composed of black and soot.

Composition of air pollution 8 The so-called "air pollution" refers to the phenomenon that harmful substances enter the atmosphere and cause harm to human beings and organisms. If it is not controlled and prevented, it will seriously destroy the ecosystem and human living conditions.

Some air pollution is caused by natural factors, such as forest fires and volcanic eruptions. There are also human factors such as automobile exhaust, industrial waste gas, smoke and dust, and explosion. Among them, human factors are the main factors, especially the pollution caused by modern transportation and industrial production to the urban atmosphere is more serious. Therefore, people pay more and more attention to air pollution.

The substances that cause air pollution are carbon monoxide CO, sulfur dioxide SO2, nitric oxide NO, ozone O3, smoke and dust, salt particles, pollen, bacteria and buds.

The near-earth atmosphere tens of meters above the ground is the living space for human beings and creatures. The quality of this layer of air directly affects human production and life. In recent years, due to the development of transportation, a large number of automobile exhaust gases react with some substances in the air, producing new substances such as nitrogen oxides, ozone and acetaldehyde, which are very harmful to human body.

Various aerosol particles suspended in the atmosphere can be divided into dustfall and floating dust according to their size. Among them, the dustfall particles are larger, the diameter is larger than 10 micron, and their natural sedimentation rate is faster. It is closely related to the mortality of human bronchitis and the reduction of agricultural production; The floating dust particles are relatively small, with a diameter of 0.1-1.0 micron. Its natural sedimentation rate is very small, so its life history of suspension in the atmosphere is very long. With the decrease of particulate matter, the concentration of toxic elements will increase. Usually, floating dust smaller than 0.3 micron can be directly inhaled into alveoli, and long-term accumulation will damage respiratory function, causing incurable diseases such as asthma, emphysema, silicosis and lung cancer. Because of the long pollution period and strong toxicity, floating dust is very harmful. When the aerosol particles in the atmosphere increase to a certain extent, smoke will appear, visibility will be reduced and solar radiation will be weakened.

The degree of air pollution in the surface layer is closely related to meteorological conditions, with obvious seasonal and daily changes. Generally, in windless weather, air pollution is the most serious in the morning and evening in winter. In summer, due to the unstable stratification of air, pollutants are easy to spread to high altitude, so the general pollution will not be too serious.