What is the function of dust?

After reading the dust journey, I have a new understanding of this insignificant dust. The ubiquitous dust is not only annoying, but also beneficial to human beings.

Dust is a tireless traveler in this world. It drifts with the turbulence of air. The air around us is almost everywhere, from indoors to outdoors, from cities to villages, from plains to mountains, from deserts to oceans. A truly dust-free space can only be created in the laboratory.

So much dust wandering in the air has a great influence on the weather. It turns out that Dust is still a small engineer who makes clouds and raindrops. They will help the moisture in the air condense into clouds and raindrops. Without them, there would be no white clouds roaming in the sky and no heavy rain and light rain. Without them, in summer, strong sunlight will directly hit the earth, making it impossible for the temperature to drop. This is the role of dust in nature. In the quiet air, dust began to fall at different speeds. After many days, the roof, doors and windows, bookshelves, desktops and floors were covered with dust. These dust will rise again because of the turbulence of the air, and the wind will blow them far away.

So where did the dust come from? Some are rock fragments falling from mountains, some are dried and daubed in fields, some are salt powder produced by evaporation in Hai Mo, some are volcanic ash, and some are cosmic dust collected from interstellar space. These are all natural dust.

There are many kinds of dust that are harmful to human life. Since organic matter joined the dust team, you see, this kind of harm is even more serious. So what harm does dust do to human life? It will pollute our air and our houses, and sometimes it will destroy our industrial products and turn them into waste products. Moreover, the most serious thing is that dust is the destroyer of the respiratory pipeline, which will block the nostrils, inflame the trachea and hurt the lungs, thus causing infectious diseases such as colds, flu and pneumonia.

In recent years, scientists have invented the method of capturing dust with high voltage current. Humans are trying to control the progress of dust, so that the ubiquitous dust is no longer a scourge of human beings, but benefits human beings.