Essay 500 words for a dust or typhoon

Always wipe diligently, don't make dust. "But have you ever thought that the life of human travel wisdom is inseparable from me! I absorb some of the sun's rays and reflect them around, like countless point lights.

The sunlight passed through my reflection, and its intensity was greatly weakened, and it was softened by the dismantling of the answer. If there is no me in the atmosphere, the strong sunlight will make it impossible to open one's eyes. Interestingly, I also have a "weird temper" that tends to reflect violet, blue, and cyan light with shorter light waves, and "likes" to absorb other colors with longer light waves.

Due to the higher levels of dust in the lower atmosphere, the sky we see on the ground is blue. If there were no dust in the atmosphere, the sky would be white. I mostly have a moisture absorption function.

The water vapor in the air has to cling to me to condense into small droplets. In this way, when the water vapor in the air reaches saturation, the dispersed water vapor adheres to me and forms stable water droplets, which can float in the air for a long time. If I hadn't been in the air, everything on the ground would be wet.

To make matters worse, there can be no clouds in the sky, no rain or snow to regulate the climate, and no water that evaporates from the ground to the sky can return to the ground. If there is less and less water on the earth, and eventually it dries up completely, life will not be able to survive. In addition, due to the refraction of sunlight by these small water droplets, there will be natural scenes such as sunset and sunset, idle clouds and fog, rainbow and sundial halos.

Look, how useful I am! If the world did not have me, how monotonous nature would become! After listening to my own words, you will also "always wipe diligently, do not cause dust." "What?

I am dust. In my daily life, I was always ruthlessly spurned by people, as if I was some kind of beast that people avoided me. For thousands of years, I've lived this "rat crossing the street—everybody shouting and fighting" days, so much so that even I am ashamed of my existence.

Actually, I am not as useless as people think, and I also quietly contribute to human life. Today, I would like to take this opportunity to introduce myself to you, hoping that you can have a comprehensive, objective and fair understanding of me.

First of all, I want to be honest and admit to everyone that people hate me for a reason, because I am the enemy of human health. I am a breeding ground for bacteria and viruses, flying around with them, causing all kinds of diseases to plague mankind. The countless egos produced in modern industry will not only cause environmental pollution and induce respiratory diseases, but also cause workers to suffer from various difficult occupational diseases, endangering their lives and health.

In addition, I am also regarded as a big enemy by some high-tech industries and products. Because most of them require production and operation in a dust-free environment. For example, on the computer, too much will block the CPU

fan, causing the fan to stall, causing the CPU

The consequence of overheating and burning will also cause corrosion of the circuit board, affecting the connection between the card boards, making it impossible to operate normally.

However, I also have my strengths and strengths, and I have contributed to the survival of mankind. Without me in the atmosphere, sunlight would not be absorbed, reflected, scattered, or refracted, and the sky would be either too bright or too dark. Without me, the harmful rays in the universe would not be blocked and absorbed, and their long-term drive would directly threaten the survival of mankind.

Since I am hygroscopic, without me, the water vapor in the air cannot condense, and clouds and rain cannot form. Without the cover of clouds, the earth will be exposed to the relentless sun;

Without the moisture of the rain, the land becomes arid and barren. I can also make the earth gently obtain the sun's energy, regulate the temperature of the atmosphere, so that the weather does not suddenly cold and heat, suitable for the survival and reproduction of life. In addition, the existence of an appropriate amount of me is also conducive to enhancing human immunity and resistance, so that human beings will not become flowers and plants in the greenhouse and live a healthier life.

Friends, after listening to my self-report, do you have a deeper understanding of me? I am not asking you to correct my name, but I hope that you will know me correctly so that I can better contribute to humanity.

I am a tiny speck of dust, and my friends are everywhere in nature.

Although people hate me and despise me, I have many advantages, so let me tell you one by one: how can you get strong sunlight without me, and you can't walk in the sun, because the strong light will pierce your eyes, and it is my scattering, and the intensity of the light will be greatly weakened, so that it will become soft.

What would happen to nature without me in the sky? Did you know?

My diameter is generally between a few millionths of a millimeter and a few hundredths of a millimeter.

I'm very hygroscopic, and if I didn't have it, most of my life would be wet, and I'd suck the wet dew into my stomach.

People you really underestimate me, I have a lot of advantages to tell you, but you look down on me so much, I don't bother to tell you.

If there is no me, how can you see the sunset, rainbow, sunset and other beautiful scenery, how monotonous nature will be!

I appeal to human beings, not to regard me as an enemy, but to treat me as a friend, and I will make nature more beautiful.

There is life and death in the pen, you can't blindly kill it, look at it dialectically, personify, technique, and write the true feelings