What does the symbol "infinite cycle ∞" often appear in CCTV weather forecast mean?

The symbol of "infinite cycle ∞" in weather forecast means "haze".

Haze, also known as haze and ash haze, refers to the turbidity phenomenon formed by the suspension of a large number of particles such as unexplained smoke and dust. The core substance of smog is dust particles suspended in the air, which are called aerosol particles in meteorology.

Haze contains hundreds of atmospheric chemical particles, which can cause respiratory diseases, cardiovascular diseases, blood system, reproductive system and other diseases, such as pharyngitis, emphysema, asthma, rhinitis, bronchitis and other inflammation.

Extended data:

To deal with the harm of smog, do the following:

1, do your own protection? Wear a formal and qualified mask that matches the size of your face when you go out, which is highly protective. Wash your face, rinse your mouth, clean your nasal cavity and remove the pollution residue attached to your body when you come back from outside. Besides cleaning the face, clean the exposed parts of the body.

2. Go out less and do less morning exercises? Reducing going out is the most effective way to protect yourself. Especially the elderly, children, pregnant women, patients with heart disease, patients with respiratory diseases and other people who are sensitive to pollution, it is best to reduce outdoor activities on cloudy days.

3. Try to open the window as little as possible? Try not to open the window in foggy days. If it is really necessary to open the window for ventilation, try to open the window for ventilation when the smog in 10~ 14 is light, and the time should be half an hour to 1 hour, not too long.

4. Reasonable diet? If you want to drink more water in foggy days, you can add chrysanthemum, olive, lily and Ophiopogon japonicus. To make traditional Chinese medicine tea substitute with lung moistening and cough relieving effects, so as to relieve the problem of dry throat and cough and reduce the harm of air pollution to the lungs. You can eat some foods such as tremella, lily, pear and Siraitia grosvenorii. These foods have the functions of nourishing yin, moistening lung, clearing heart fire and calming nerves. After eating, they can enhance the vitality of the lungs and reduce the harm of smog to the body by improving the body's immunity.

5. Acupoint pressing? Xiang Ying point is a "wind-sensing place" and a "wind-proof place" on the body surface. Regular massage can dispel the wind on the head and face, dispel the cold on the top of the head, and thus enhance the ability to resist external evils. Daily massage can also be used as a method to prevent nasal discomfort in foggy days. Xiang Ying points are located in the depressions on both sides of the nose, and are massaged with appropriate intensity.

6. Purify indoor air? Some green plants that can purify the air can be planted indoors, such as aloe, cactus, green radish, chlorophytum, tiger orchid, asparagus and other green crown-leaf plants.

References:

Baidu encyclopedia-smog

People's Network-Smog is harmful, and Chinese medicine will help.