As winter begins, smog days begin to increase. encountered a serious haze day, netizens quipped: I thought I was flying on the road in this weather, and there were auspicious clouds on both sides.
The farthest distance in the world is not life and death, but I stand in front of you on a hazy day, but you can't see who I am.
In Qingdao, the air quality has also fluctuated greatly in winter, and there has been light pollution recently, and the number of days when fog and haze alternately have increased, so how much do you know about fog and haze?
What is smog?
Haze, as the name suggests, is a combination of "fog" and "haze". Fog and haze are both visual impairments, but they are not fundamentally the same, and they are distinctly different. Fog is a natural phenomenon in which water vapor in the air condenses into tiny droplets suspended in the air, reducing visibility. Haze is called haze and haze, which refers to the turbidity phenomenon caused by the suspension of particles of unknown cause, which is an extreme pollution weather. Pure fog and haze are very different in composition and formation mechanism, but it is difficult to accurately distinguish them in actual observations. Especially in cities with relatively developed industrial production, atmospheric aerosols and suspended solids are easy to accumulate in calm and stable weather, and most of the fog appears in haze.
How to identify haze?
Although the low visibility of haze days is its prominent feature, but the island city is foggy, sometimes when you get up, you will find that the window is "fairy-like", many people do not know whether it is a foggy day or a haze day, at this time you need to understand the AQHI index.
Residents of the island city can log on to the official website of "Qingdao Center for Disease Control and Prevention**" or "Qingdao Disease Control" WeChat*** to check the AQHI index of the day and take health protection according to the prompts.
Qingdao Center for Disease Control and Prevention** entrance.
Qingdao Center for Disease Control and Prevention** data.
Qingdao Disease Control WeChat*** entrance.
Qingdao disease control*** data.
You can also install various mobile apps to know the air quality index (AQI) of your city in real time to guide your travel, for example, using "care about the air" (below).
Care about air app data.
What are the hazards of smog?
Direct hazards
The direct impact of haze on health is mainly irritating symptoms and acute effects, and the main manifestations are: eye and throat irritation, cough, dyspnea, nasal congestion, runny nose, rash, upper respiratory tract infection, conjunctivitis and other diseases, and the incidence of some respiratory and cardiovascular system diseases increases.
Indirect hazards
1.The appearance of smog will weaken ultraviolet radiation, affect the body's vitamin D synthesis, and greatly reduce the absorption of calcium.
2.In the absence of sunlight on hazy days, bacteria, viruses and microorganisms on the surface of the ground will multiply rapidly, enhancing the activity of infectious bacteria in the air.
3.Smog days will also affect people's mental health, some people will have mental laziness, low mood, serious depression, pessimism and other bad emotions, aggravate the state of psychological depression.
4.Reduced visibility on smog days poses a great safety hazard to pedestrians and vehicles.
On smog days, these 4 tips are enough
Try to avoid outdoor activities
Reduce outdoor activities and cut off contact with them directlySensitive groups (the elderly, children, pregnant women, people with respiratory and cardiovascular diseases) should avoid outdoor activities.
When outdoors
1.Wearing a protective mask with high filtration efficiency and a breathing valve during outdoor activities can effectively reduce the inhalation of fine particulate matter in haze.
2.When you come back from going out, you should clean your nasal cavity, face and bare areas in time.
3.Drive cautiously and keep a safe distance from the vehicle in front.
What you can do indoors
1.Reduce window ventilation and follow the principle of short time and less frequency.
2.The wet dust removal method is used to avoid the resuspension of indoor dust.
3.If possible, the air purifier can be turned on, and studies have shown that when the doors and windows are closed and the air purifier is turned on for a period of time on haze days, the indoor air PM25 concentrations will be significantly reduced.
Eat scientifically and drink plenty of water
It is advisable to choose vitamin-rich foods in your diet, and eat more foods that clear the lungs and dissolve phlegm. Reminding boyfriends and girlfriends to drink more water is also a proper formula on hazy days.
Contributed by Garnan
Reviewer: Wang Bingling