What are the characteristics of dust? What is the role

Dust is something that everyone hates, it hinders environmental health and endangers human health, so people have always been diligent in wiping it throughout the ages, so as not to stain dust, but have you ever thought that human life is inseparable from dust, if there is really no dust in nature, what kind of situation will we face? The diameter of dust particles is generally between one millionth of a millimeter and a few 1% millimeters, and the dust that the human eye can see is a behemoth in the dust, and the fine dust can only be seen under the electron microscope. If there is no dust in the atmosphere, strong sunlight will make people unable to open their eyes, and the gas in the atmosphere is easy to scatter, violet, blue and blue light, so in general, the sky is blue, and dust is different, it indiscriminately scatters seven colors of sunlight. We see distant skies gradually turning from blue to white as they fall in height, because of the high dust content in the underlying atmosphere.

If there is no dust in the atmosphere, the entire sky will always be blue due to the scattering of sunlight by only gases. Dust mostly has hygroscopic properties. The water vapor in the air must adhere to the dust to condense into small water droplets, so that when the water vapor in the air reaches saturation, the dispersed water vapor will adhere to the dust and form stable water droplets, which can float in the air for a long time If there is no dust in the air, everything on the ground will be wet.

To make matters worse, it is difficult to form clouds and fog in the sky, and it is difficult to form rain and snow to regulate the climate. The gradual increase in water vapor evaporation from the ground into the atmosphere, and the continuous rise in relative humidity in the atmosphere will affect the survival of organisms. In addition, because of the refraction of sunlight by these small water droplets, there will be sunset, idle clouds and mist, rainbow halo, and other meteorological and thousands of natural scenery, if there is no dust in the air, nature will be very monotonous.

Features: Dust pollutes the environment, spreads germs, and endangers human health Function: Makes sunlight soft through the reflection of dust.

Dust mostly has hygroscopic properties. The water vapor in the air must be attached to the dust in order to condense into small water droplets, because of the refraction of these small water droplets on the sun, there will be sunset, idle clouds, rainbow halo and other meteorological natural scenery.

Dust can condense water vapor and turn them into water droplets, otherwise everything will be wet and living things will not survive, I wrote very much, right?