A 45-word composition about why I know to plant trees.

article 1: there are many benefits of afforestation

to green the motherland is to carry out afforestation activities and cover the country with green plants. Afforestation has many benefits!

first of all, afforestation can release wind and fix sand. Every time the wind blows and the sand flies, people who have to go out are like fish struggling in the stormy waves. People who follow the wind can't help but fly forward, their legs go forward against the wind, and their bodies fall back, making people miserable. In order to resist the attack of sandstorm, we must vigorously plant trees, thus playing the role of wind and sand fixation.

Secondly, afforestation can provide many valuable resources. Wood is the main product of forest, which can be used for building houses, building bridges and making paper. Wood can also be used as tools, furniture, handicrafts and other daily necessities. There are edible aspects, such as sweet and sour fruits, crisp tea, advanced medicinal materials, etc. In short, it plays a great role.

Thirdly, afforestation can eliminate air pollution and beautify the environment. These "environmental guards" such as dust and carbon dioxide we absorb every day have played an inestimable role in purifying the air and ensuring people's physical and mental health. (Wujiang Zhenze Yilong Redwood-Yilong Literature www.sz-ylhm.com)

In addition, afforestation can prevent soil erosion, reduce noise, protect ecological balance, and provide ideal places for people to study, work, entertain and live.

forests are really people's loyal friends, but now, forests are disappearing rapidly, which has become a major concern for us. Therefore, afforestation has become a top priority!

We want to plant trees, and we want to green the motherland!

There are many benefits of afforestation in Grade 6 Zhang Xiaona

-5 words

Chapter 2: There are many benefits of afforestation

Abstract: First of all, afforestation can purify the air. During the growth of trees, due to photosynthesis, they can absorb a lot of harmful gases such as carbon dioxide, thus purifying the air. According to scientists' calculations, the trees on the earth. Grassland treats 2 billion tons of waste gas for human beings every year.

In today's industrialized era, when human beings are proud of the appearance of high-tech products, a silent disaster is quietly covering the earth. This is the environmental problem. The most effective way to solve this problem now is to plant trees.

indeed, afforestation has many benefits.

First of all, afforestation can purify the air. During the growth of trees, due to photosynthesis, they can absorb a lot of harmful gases such as carbon dioxide, thus purifying the air. According to scientists' calculations, the trees on the earth. Grassland treats 2 billion tons of waste gas for human beings every year. Sometimes a blowhole can suck in 2.5 trillion carbon dioxide molecules in one second, and the number can be imagined.

Secondly, afforestation can prevent wind and fix sand. (1) Cultivation of shelterbelts can resist sandstorms. The main function of shelterbelts is to reduce the strength of wind. When the wind meets shelterbelts, the speed will be reduced by 7%-8%. (2) it is to cultivate turf. With the lawn covering the ground, even if there is wind, there is not much sand blown, which reduces the source of sand. From these two points, we can see that afforestation plays an important role in preventing wind and fixing sand. (Wujiang Zhenze Yilong Redwood-Yilong Literature www.sz-ylhm.com)

Thirdly, afforestation can prevent soil erosion. Due to long-term reclamation in China, soil erosion is serious in some areas. It is estimated that if the topsoil with a thickness of 2 cm is washed away by rain, it will take 575, years for woodland, 82, years for grassland, 46 years for cultivated land and 18 years for bare land. This shows that the lack of forest vegetation will aggravate soil erosion.

afforestation can purify the air, protect the environment, prevent wind and fix sand. Since afforestation has so many benefits, we should plant trees to build our home better.

-6 words

Chapter 3: Afforestation has many benefits

To green the motherland is to carry out afforestation activities and cover the country with green plants. Afforestation has many benefits!

first of all, afforestation can release wind and fix sand. Every time the wind blows and the sand flies, people who have to go out are like fish struggling in the stormy waves. People who follow the wind can't help but fly forward, their legs go forward against the wind, and their bodies fall back, making people miserable. In order to resist the attack of sandstorm, we must vigorously plant trees, thus playing the role of wind and sand fixation.

Secondly, afforestation can provide many valuable resources. Wood is the main product of forest, which can be used for building houses, building bridges and making paper. Wood can also be used as tools, furniture, handicrafts and other daily necessities. There are edible aspects, such as sweet and sour fruits, crisp tea, advanced medicinal materials, etc. In short, it plays a great role.

Thirdly, afforestation can eliminate air pollution and beautify the environment. These "environmental guards" such as dust and carbon dioxide we absorb every day have played an inestimable role in purifying the air and ensuring people's physical and mental health.

In addition, afforestation can prevent soil erosion, reduce noise, protect ecological balance and provide ideal places for people to study, work, play and live.

forests are really people's loyal friends, but now, forests are disappearing rapidly, which has become a major concern for us. Therefore, afforestation has become a top priority!

We want to plant trees, and we want to green the motherland!

There are many benefits of afforestation in Zhang Xiaona, Grade 6

-5 words

Chapter 4: Afforestation to protect the environment

In recent years, extreme weather conditions have occurred all over the world, some countries have suffered from floods, some countries have experienced droughts that have never happened in a century, and some countries have experienced mudslides, landslides and various terrible natural disasters, all of which are caused by human destruction of the environment. So now people pay more attention to environmental protection. As for me, I also start from the little things around me and be an environmental citizen.

Every year, March 12th is Arbor Day. On this day, I always take part in afforestation activities organized by the Bureau of Landscape Architecture. Early in the morning, we came to the zoo and received a small sapling belonging to me. After coming to the planting area, my father and mother and I each took a shovel and dug up the soil one by one. Soon, we dug a big and deep pit. Then, we put the sapling gently in the pit together, fearing that it would hurt the sapling. My mother held the sapling with both hands, and my father and I took shovels and shoveled the dug soil in one by one. Fill it in for a while, step on it, and step on the soil. In this way, we did it several times. Our saplings can finally stand there straight, just like the sentinels on the grassland, so spirited and lovely! Finally, I am asked to water the sapling so that it can absorb nutrients and grow quickly.

Looking at my sapling, although I feel very tired, I am proud, I am proud! Because I added a green hair to Mother Earth. In the future, my sapling will grow into a big tree, which will protect Mother Earth and make her younger and more beautiful! Let our air be fresher and the environment more beautiful!

Grade 5: Ma Zheqi

-5 words

Article 5: Arbor Day Composition Planting Trees

It's the annual Arbor Day again, and we begin to protect trees and forests. More than half of people think that forests and trees should be protected only on Arbor Day, but my opinion is just the opposite. We should protect forests and trees all the time instead of just on Arbor Day.

Hundreds of millions of years ago, when the earth was owned by animals, the plants were lush, full of vitality and green. However, after the emergence of human beings with far higher IQ than other animals, the plants decreased dramatically as if they were enchanted. That's because human beings cut down trees to build houses. Some people cut down trees in large numbers to leave open space for building because of commercial needs. It is precisely because many people cut down forests and trees without authorization that nature is destroyed.

cutting down trees has many disadvantages. Everyone knows that trees can recycle carbon dioxide. If a large number of trees are cut down, the number of trees will decrease sharply, and the carbon dioxide we breathe out cannot be recycled. Dense trees can stop sandstorms. Two years ago, Beijing was hit by sandstorms, and the whole city was covered with sand, which was also caused by the lack of tree protection.

Everyone knows about the Two Bay Cities in the Central Plains! In the past, it was in rags. The tiles of those bungalows were one hole in the east and one hole in the west. The doors were made of a board, and the streets were full of garbage and dirty. Now apartments and buildings have been built in the two bays of the Central Plains. The river is crystal clear, and the willows along the river swing gently with the breeze. This is why people realize the importance of respecting nature and protecting the environment.

I hope everyone can protect the forest, protect the trees, and make the city life more green!

-5 words

Chapter 6: Afforestation machine

I found that people don't seem to care much about our mother earth: cutting down trees, burning forests, folding flowers and plants at will, etc., so that our mother earth's green clothes gradually disappear. Of course, the only way to recover is to plant trees. But planting trees will not only be very tiring, but also take a lot of materials and time. I hope there will be a solution in the future world.

I've been thinking, why can't the garbage be treated with pollution-free chemicals and turned into small seedlings? Then, the polluted water source is made into a "big tree growing liquid" with high-tech products, so that the big trees grow rapidly. It can turn the world's largest desert into a big forest with dense trees in a short time, so I came up with this idea ...

I want to turn the waste gas from the factory into the shell of a machine, turn the garbage in the city into countless saplings with "magic potion", and then use sewage as "growth water", which can not only protect the environment, but also make it into a machine. It's a good way to kill two birds with one stone.

so, how does it work? The answer is as follows: the machine first crushes the garbage and then processes it into small saplings. Then the sewage is sucked in through a pipe, evolved into a potion, and washed on the saplings. Then the sapling showed a little bud, and then it grew rapidly and became a towering tree. The manipulator took out another big tree, planted it on the land, watered it with water, and the tree survived independently.

well, is my plan good? I will definitely invent him when I grow up. Remind again: take care of trees and protect the earth!

Grade 4: Xiao Yuling

-45 words

Chapter 7: I contribute to "tree planting"

Abstract: For tomorrow's tree planting activity, I went to the supermarket with my mother to buy a small shovel, but I couldn't find a suitable bucket. When I got home, I told my father that he immediately found a bucket that I hadn't used for many days, but it was too dirty. In order to let me finish my homework and go to bed early, my father said that he would help me wash it. In less than ten minutes, a bucket as clean as new appeared.

March 12th, do you know what festival it is? By the way, it's Arbor Day in China.

The teacher said, "Forest trees provide many things for our life. They can not only provide oxygen, purify the air, beautify the environment, and are conducive to the protection of the ecological environment, but also plant trees to preserve water and soil. " After listening to what the teacher said, we all want to have the opportunity to plant trees by ourselves.

The teacher said, "Then we will plant trees tomorrow to contribute to' afforestation'."

for tomorrow's tree planting activity, my mother and I went to the supermarket to buy a small shovel, but we couldn't find a suitable bucket. When I got home, I told my father that he immediately found a bucket that I hadn't used for many days, but it was too dirty. In order to let me finish my homework and go to bed early, my father said that he would help me wash it. In less than ten minutes, a bucket as clean as new appeared.

the next day, the spring breeze was warm and the sun was shining. I took a clean bucket and a brand-new shovel and went on the road happily.

after the students met, they walked to the planting area. Wang Aiyang and I were assigned to a group, and the teacher gave us a small sapling. I carefully protected the saplings, while Wang Aiyang was carrying a bucket and a shovel. We chose a clearing and dug a hole. In a short time, I was sweating like a pig. Wang Aiyang asked me to have a rest. I shook my head gratefully, wiped the sweat from my forehead, and continued digging. I also mashed the dug soil as much as possible. Finally, I dug it up. I gently planted the roots of the saplings in the pit and supported the saplings. Wang Aiyang quickly covered the soil.

We watered the saplings according to the teacher's request. Then I hung my elaborate "ID card" on the sapling, and we agreed to visit the sapling planted by ourselves on this day next year. We wish the sapling to grow up and thrive with us.

-7 words

Chapter 8: Significance of Afforestation

Afforestation can keep water and soil

Afforestation can keep water and soil. Where the vegetation coverage is low, there will be a lot of sediment flowing into the river in rainy season, which will destroy the fields, fill up the riverbed and block the estuary, which is extremely harmful. To curb soil erosion, it is necessary to plant trees, because trees have roots as large as crowns and can hold the soil firmly like giant hands. The water in the soil that is caught is continuously absorbed and stored by the roots. According to statistics, an acre of forest stores 2 tons more water than that in forestless areas.

Afforestation can prevent wind and fix sand

Wherever the wind blows, the countryside will be buried and the city will become ruins. To resist the attack of sandstorm, it is necessary to build shelter forests to weaken the wind. Once the wind meets the shelter forest, the speed will be reduced by 7%~8%. If many forest belts are arranged in parallel at a certain distance and grass is planted, the sand blown by wind energy will be reduced.

Afforestation can purify the air for human beings

We know that people breathe in oxygen and breathe out carbon dioxide every day. Trees, on the other hand, keep photosynthesis under the sunshine, breathe in carbon dioxide and release oxygen. According to statistics, an acre of forest can absorb 67 kilograms of carbon dioxide and release 49 kilograms of oxygen every day, which is enough for 65 adults to breathe.

Afforestation can eliminate pollution

Trees can adhere to dust in the air and make the air clean and fresh. Scientific tests show that one acre of forest can absorb 4 kilograms of toxic gas sulfur dioxide a month and 2-6 tons of dust a year. One acre of pine and Berlin can secrete 2 kilograms of bactericidal agent for two days and nights, which can kill bacteria such as tuberculosis, typhoid fever, diphtheria and dysentery.

Afforestation can reduce noise pollution

Planting trees on both sides of the road can reduce noise, and various tree types, flowers and green branches and leaves can beautify the environment and provide an ideal environment for people to study, work and live.

Afforestation provides many useful raw materials and supplies

In terms of eating, there are all kinds of sweet and delicious fruits; There are fragrant tea leaves; There are also Ligustrum lucidum on the holly tree that nourishes the body, delicious and delicious ginkgo biloba and other precious medicinal materials. In terms of use, wood is needed for construction, coal mining, transportation, manufacturing vehicles, ships, ruler machines, building bridges, docks, paper making, etc.

Although what I'm doing now is only a little thing, I firmly believe that if we all have the responsibility to protect the environment, starting from ourselves and starting from small things, and working together to protect our homeland, we will naturally give human beings due rewards. Take a nap on the warm cradle grassland; Grow up under the kind smiling face sky and bathe in the river, the source of love!

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