How to control smog with 500 words?

The environment around us has been seriously damaged. Take the smog weather in recent places for example. Since October 28th, 65438/kloc-0, there has been a wide range of haze weather in central and eastern China, and the haze area in China has exceeded 1 10,000 square kilometers. In addition to the fog warning, the Central Meteorological Observatory also issued a blue fog warning signal. When the fog occurs, the relative humidity is not high, but it is saturated in the fog (if there are a lot of condensation nuclei, the relative humidity may not reach 100%). Generally speaking, the visibility deterioration caused by atmospheric haze blurred vision is caused by haze when the relative humidity is less than 80%, while the visibility deterioration caused by atmospheric haze blurred vision is caused by fog when the relative humidity is more than 90%. The visibility deterioration caused by atmospheric haze blurred vision is caused by a mixture of haze and fog when the relative humidity is between 80 and 90%, but its main component is haze. The thickness of haze is relatively thick, which can reach about 1-3 km. Haze is different from fog and clouds, and there is no obvious boundary between haze and clear sky. The distribution of smog particles is relatively uniform, and the scale of smog particles is relatively small, from 0. 00 1 micron to 10 micron, and the average diameter is about 1-2 micron. Floating particles are invisible to the naked eye. Because the smog is composed of dust, sulfuric acid, nitric acid and other particles, the longer the scattering wavelength, the more the light ratio, so the smog looks yellow or orange-gray. There are three elements in the formation of smog: one is the physical basic source of particulate matter. China has the largest loess plateau area in the world, and its soil texture is the easiest to produce granular dust particles. Second, poor exercise leads to dust. For example, the mud in the garden in the middle of the road and the soil on the roadside stones will flow to the road after raining or splashing water, which will produce a lot of dust after one hour of drying. Even if these particles fall back to the ground, they will be thrown over the city again because of the continuous passing of cars. Thirdly, the basic source of dust and the process of movement difference gather in a certain spatial range, and particles finally gather with water molecules to form haze. At present, in more than 350 cities in the Loess Plateau of China, the three elements of smog structure are quite rich. Friends, has the earth been destroyed like this? What reason do we have to continue to break the ring? Let's act together to protect our earth.

"Thinking brought by smog" composition, 500 words! ! Urgent! ! Cough, cough, cough ... This usually rare sound has recently spread in many areas like the wind. Masks, which are not commonly used, have recently been pushed to the forefront and become the latest source of interest for major businesses. The respiratory department of the hospital is different from the past, and it is overcrowded! The sky is gray, too, and Fiona Fang is shrouded in fog. All this is your smog masterpiece.

Fog, a thin veil between heaven and earth, quietly hides everything between heaven and earth, and you just wear a big hat of gloom. You know, this hat has harmed many people's original healthy bodies, allowed all kinds of particles in the air to take advantage of it, and forced many hard-working students to suspend classes ... Your countless influences have disrupted our lives and caused many irreparable phenomena.

Nowadays, wearing a mask, standing on the roadside looking into the distance, it seems that fog has successfully occupied the whole world. Everything is embedded in the hazy fog, and the buildings more than 100 meters apart have become a mirage. This kind of weather is becoming more and more frequent. Smog is silently invading the city where we live, firing at our city, making our air pollution more and more serious and air quality seriously declining.

I can't help thinking, who is behind the smog? The answer is definitely the same, and the black hand behind it is ourselves! Nowadays, many families own cars, which makes our travel more convenient and fast. But have we ever paid attention to the exhaust gas emitted by cars? The answer is no, the Spring Festival is coming, and the gorgeous fireworks dazzle us. But who noticed the smoke in the air? The answer isno. Nowadays, all kinds of chemical plants and refineries in our city are doing everything they can, emitting all kinds of smoke and toxic substances day and night, but has anyone noticed this? The answer is still no.

What we want is environmental protection and health. Please don't sacrifice these two most precious things for the so-called good life. As long as we are good at discovering those phenomena that are not environmentally friendly in our lives and dare to stop them, we will definitely turn our present life into a truly beautiful life. Now, I, an ordinary pupil, make an appeal: to cure haze, start with me and everyone.

On the causes of smog 500-word travel composition: the smog weather is mainly caused by extensive development mode and unreasonable industrial structure and energy structure. Its root is also fossil energy, one is burning coal and the other is fuel oil. In addition, the development mode is relatively extensive, and a large number of pollutants are discharged. [1] The specific reasons are as follows: 1. Atmospheric pressure is low and air stagnation is the main factor. Because the air does not flow, the tiny particles in the air gather together and float in the air. 2. The ground is dusty and the air humidity is low. People and vehicles on the ground stir up dust. 3. Automobile exhaust is the main pollutant emission. In recent years, there are more and more cars in cities, and automobile exhaust is a factor of smog. 4. Secondary pollution produced by factories. 5. Heating discharges pollutants in winter.

The main way to control smog is to reduce emissions. At present, the extensive use of various fossil fuels is the main cause of haze weather. The most effective way to fundamentally solve the smog problem is to reduce emissions. Think about it, power generation needs to burn coal, but in fact, less than 30% of coal is converted into electricity, and the rest is discharged. Tip: When you are away from home, Pu Weixin is from the United States, and you can find it in official website Jing @@; Cars, ships and other machinery need oil. Similarly, the engine only converts less than 30% oil into power, and the rest is discharged. In other words, we are "extravagant" in using energy, using less and emitting more. It is unrealistic to reduce the use of energy. Clean energy is far from meeting the demand and is expensive. If the existing energy can be utilized by 70% and discharged by 30%, environmental problems and energy problems will be solved at the same time, and human society will be sustainable. At present, an unconventional engine, named "Reciprocating Rotor Engine", was invented by China people and has been published on the Internet, which is expected to realize this wish of mankind. I hope this kind of mechanical energy will come out soon. Also, there are many kinds of trees.

Smog I want to tell you composition 500 In recent days, the sky has been overcast, and the sun can't be seen, giving people a chilly feeling. Look: Nearby, two cooling towers of Mid-Levels Power Plant are looming; Mid-levels in the distance, disappeared. It will also make people lazy and depressed all day. Newspapers and TV are promoting that the smog is serious recently, so we should go out as little as possible and open the window less. It can be seen that smog seriously pollutes the air, reduces air quality and affects human health. I really want to know the harm of smog to people, so I checked it online. It's really "I don't know if I don't see it, I'm surprised when I see it!"

Haze consists of hundreds of atmospheric chemical particles. These include: organic sol particles, fuel and automobile exhaust. It can directly enter and attach to human respiratory tract and alveoli, causing acute rhinitis and acute bronchitis. For patients with obstructive emphysema and bronchial asthma, smog weather will make the condition acute. Staying in this environment for a long time will also induce cancer.

It has an effect on the cardiovascular system. Haze weather has many pollutants and low air pressure, which is easy to cause acute attack of cardiovascular system. For example, when the fog is heavy, the water vapor content is high. If people exercise outdoors, it will cause chest tightness, high blood pressure and other symptoms.

Hazy weather will also lead to the weakening of ultraviolet rays on the surface and the breeding of infectious bacteria. Due to the decrease of sunshine, children's ultraviolet radiation is insufficient, vitamin D production in the body is insufficient, and calcium absorption is reduced, which causes rickets in infants and children and slows down their growth and development. It will also directly affect people's mental health and make people lazy and depressed. No wonder I feel so unhappy these days.

It seems that to eliminate smog, it is necessary to reduce waste emissions; Measures to reduce dust; In particular, we should drive less cars and travel more by bus. For a better tomorrow, let's start environmental protection action today. Blue sky, clear water, green and tranquility need to be created by ourselves!

About 500 words of classroom discussion composition about smog Nature is the mother of human beings, animals and plants. Once upon a time, she was beautiful and clean She likes to do magic tricks for us and make our life colorful: sometimes she brings us clear skies and Wan Li, and sometimes she brings us clouds, rain and snow. We have been living happily in her arms.

When I opened my eyes in the morning to enjoy the first ray of sunshine, I found that the sky was gray and the whole earth was covered with gauze. What's going on here? When I walked out of the house, I found that the trees were not green, the flowers were like deflated balls, my head was drooping, and even the birds that liked twittering best stopped singing. I got in my father's car and went to school. Cars crawl slowly like snails, and pedestrians on the road wear various masks. I thought to myself: Is Mother Earth sick? I came to school with doubts. In the morning, just as we were preparing to queue up to do exercises, the radio suddenly said that practice was suspended during recess. I looked at the white playground, and my heart was empty.

Where is the smog sacred? This makes us uneasy. I opened the dictionary to find the answer. It turns out that smog is a turbid phenomenon formed by a large number of particles such as smoke and dust suspended in the air. When it reaches a certain density, it forms fog. It turns out that coal stoves are used for heating in winter in the north, which emits a lot of smoke and dust; There are many power plants, steel mills, brick factories and chemical plants around us ... the chimneys of these factories constantly emit exhaust gas; Many families have cars, which makes it more convenient to travel, but the exhaust gas emitted by cars pollutes the air, which is the main cause of smog. It seems that the smog is actually caused by human beings themselves.

I want to get rid of the smog more and more, and I also want to see my mother's bright smiling face. I want to tell people: driving less cars and riding more bicycles can not only exercise, but also reduce pollution. From now on, close factories with serious pollution, plant flowers and grass, and advocate green travel! I want to say loudly: Haze, we don't welcome you, please leave!

About today's smog, my own experience and feelings. I got up early this morning and felt a little hot in the room, so I opened the curtains and prepared to open a small window to blow the wind. No sooner had I opened the window than I was stunned by what I saw. I saw the outside world turned milky white, and I couldn't see the outside clearly. Mom got up and I took her to the window to see her. She was shocked, too. I asked my mother, "Why is it foggy today?" My mother replied, "Because the air is polluted, there is smog. We should protect the environment in the future. " It's 9 o'clock. We're going out. I thought the fog had dispersed, but when I got to the entrance of the building, it was still white outside and I couldn't see anything. Mother said to father, "don't drive today, it's too dangerous." Either you hit someone else, or someone else hits you. Let's take the bus! " "I suddenly felt very strange, so I asked my mother," Mom, you said we can't drive in foggy weather, so we can't take the bus. Isn't it the same as Dad? "My mother replied with a smile," Hehe, the bus is so big that it is easy to be noticed by other cars. "My parents and I are waiting for the bus at the station. At this moment, I saw an uncle's hand slowly approaching my mother's bag. I thought it was a thief. So I tugged at my mother's clothes. My mother asked me what was wrong, and I stared at the uncle. Mother looked at it, took off her handbag and put it on her other arm. The thief thought he had been discovered and slipped away quietly. At this time, I thought: those thieves are cheap in foggy weather, but it is really difficult to steal from my mother, because my mother and I are very vigilant. By the time my mother goes to work, time is ticking. At noon, I will go to the store next door to help my sister Zhang Ziyi decorate the Christmas tree. But the foggy sky is still white. Today, this day let me know that we should protect the harsh environment, and there will be no more such haze days.

In recent days, the sky is overcast, and the sun can't be seen, giving people a chilly feeling. Look: Nearby, two cooling towers of Mid-Levels Power Plant are looming; Mid-levels in the distance, disappeared. It will also make people lazy and depressed all day. Newspapers and TV are promoting that the smog is serious recently, so we should go out as little as possible and open the window less. It can be seen that smog seriously pollutes the air, reduces air quality and affects human health. I really want to know the harm of smog to people, so I checked it online. It's really "I don't know if I don't see it, I'm surprised when I see it!"

Haze consists of hundreds of atmospheric chemical particles. These include: organic sol particles, fuel and automobile exhaust. It can directly enter and attach to human respiratory tract and alveoli, causing acute rhinitis and acute bronchitis. For patients with obstructive emphysema and bronchial asthma, smog weather will make the condition acute. Staying in this environment for a long time will also induce cancer.

It has an effect on the cardiovascular system. Haze weather has many pollutants and low air pressure, which is easy to cause acute attack of cardiovascular system. For example, when the fog is heavy, the water vapor content is high. If people exercise outdoors, it will cause chest tightness, high blood pressure and other symptoms.

Hazy weather will also lead to the weakening of ultraviolet rays on the surface and the breeding of infectious bacteria. Due to the decrease of sunshine, children's ultraviolet radiation is insufficient, vitamin D production in the body is insufficient, and calcium absorption is reduced, which causes rickets in infants and children and slows down their growth and development. It will also directly affect people's mental health and make people lazy and depressed. No wonder I feel so unhappy these days.

It seems that to eliminate smog, it is necessary to reduce waste emissions; Measures to reduce dust; In particular, we should drive less cars and travel more by bus. For a better tomorrow, let's protect the environment from today. Blue sky, clear water, green and tranquility need to be created by ourselves!

Early in the morning, I stood at the window and looked into the distance, only to see the world in chaos. Tall buildings are looming. All around is white. Today is Thursday. Thanks to this foggy day, the content of pm2.5 broke the record. Students in primary and secondary schools and kindergartens in the city have a holiday and rest at home. We can't go to school, we can't go out for activities, and we can only make a "house" at home.

Due to the smog, the traffic on the road was blocked, and the traffic police uncle who came to communicate also brought an "anti-virus" mask. According to my father, this time the mayor specially approved the traffic police to wear masks. Yes, it's not easy for them to stand in the smog, smoking the tail gas emitted by cars and silently contributing to the smooth flow of urban traffic. The terrible smog is so terrible that students in the city can stop classes for the first time in history, and traffic police can wear masks on the road for the first time in history. However, smog is not a natural phenomenon, but is caused by human pollution to the atmosphere. For example, the main pollutant emission is automobile exhaust, as well as dust from construction sites and secondary pollution from factories.

If we humans don't take action to protect the environment and care for our home, I wonder how many will appear for the first time. Can we still live happily in this beautiful home? I hope my uncles and aunts can drive less, and the factory can put environmental protection in the first place ... For the blue sky and white clouds, for sunny days and for free breathing, let me take action from the dribs and drabs of life!

Expert comments:

By describing what he saw and heard, the author showed us the smog scene after air pollution. At the same time, a call was issued at the end of the article, which strongly expressed the hope that people would protect the environment and care for the earth.

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