What is the sign of smog?

The symbol of smoke is three horizontal lines and two horizontally connected circles.

Distinguish the severity of smog by color. Yellow, orange and red represent mild, severe and extremely heavy pollution respectively. Haze is different from common sunny and rainy clouds. The smog with water content as high as 90% is marked with three horizontal bars, and the smog with water content below 80% is marked with "8", which looks a bit like an infinite symbol in mathematics. The water content is between 80% and 90%, which is a mixture of fog and haze.

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Smog coping methods

1, open the window

Opening windows less in foggy days can reduce the spread of smog indoors, and it is best to open windows when smog dissipates or sunny days. If necessary, you can use an air purifier to purify indoor air.

Step 2 put on a mask

It is best to wear a mask when going out, which can effectively prevent dust particles from entering the human body.

Try not to go out or wear a mask.

In foggy days, the wind is light and the airflow is not smooth. There are many harmful bacteria and dust particles in the air. From the health point of view, it is best to do less outdoor activities.

4. Wash your hands often

Wash your face and hands frequently after going out. It is best to wash your face with warm water, which can remove the smog particles attached to your skin.