What are the benefits of dust?

Dust is a fine dry powder of soil or other substances, which is converted into a fine part of something; The diameter of fine powder and dust particles is generally between 1% and hundreds of millimeters.

Dust is the enemy of human health, so people especially hate it, because it carries many bacteria, viruses and eggs everywhere and spreads diseases. Industrial dust and fiber dust can make workers suffer from various incurable occupational diseases. Excessive dust will also cause environmental pollution, affect people's normal life and work, and induce human respiratory diseases.

However, the contribution of dust can never be erased. If there is no dust in the atmosphere, sunlight will not be absorbed, reflected, scattered and refracted, and the sky will be either too bright or too dark. Because dust is a hygroscopic particle, without its core, water vapor in the air can't condense and clouds in the sky can't form. Without the cover of clouds, the surface will become dry and barren, and the weather will be either too hot or too cold. Without dust, many harmful rays in the universe will break into the earth's surface without hindrance, posing a fatal threat to human beings and all kinds of creatures.

In addition to these benefits, dust can condense water vapor. Let them become water drops, otherwise, everything will be wet.

Although Dust has many shortcomings, its contribution is endless. It can make the earth get solar energy gently, and it can also make enough condensation nuclei in the atmosphere, increasing the chances of cloud and rain formation. Adjust the surface temperature to make it suitable for the survival and reproduction of life.

Dust is very harmful to computers. Excessive dust may block the CPU fan, make the fan stop running, cause the CPU to overheat and burn out, affect the contact between boards, and may also cause corrosion of the circuit board.

Lesson 12 in the first volume of the fifth grade, "If there is no dust in the world", also talked a lot about dust, I suggest you have a look.