Where does the dust in the air come from?

Dust in the air comes from industrial emissions, combustion smoke and dust, soil dust and so on. Dust is the enemy of human health, so people especially hate it. Dust flies around with many bacteria, viruses and eggs, spreading diseases. But dust is also beneficial: dust makes nature have colorful natural scenery such as sunset glow, idle clouds and rainbow halo.

If there is no dust in the atmosphere, the light that the sun shines directly on the earth will not be absorbed, reflected, scattered and refracted, and the sky will be blue, without snow, rain and dew, sunshine and rainbow.

Because dust is a hygroscopic particle, without its core, water vapor in the air will not condense, and it is difficult to form clouds in the sky. 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 and living things can't survive.

Extended data

Dust is everywhere in life. In order to protect the health of family members, do a good job in real time. For example:

1, most people always open the window in the morning for ventilation. General ventilation should only take 10 to 30 minutes. Too long will only let the dust outside enter the house.

You can open the window when you get up in the morning, close the window when you go out to work, or close the window after 30 to 40 minutes.

3. You can prepare a humidifier at home to make the indoor air moist, so that dust will not float everywhere, and it is also convenient to clean and use the air purifier.

When cleaning the house, don't lift it with a broom. If it is a white floor tile, it is best to clean it with a semi-dry mop; If it's land, it's best to spray some water on the ground with a watering can, and then gently clean up the garbage with a broom. Never clean it directly.