Traditional Culture Encyclopedia - Photography major - Inventory of smog rumors
Inventory of smog rumors
This article is directed by Beijing Science and Technology Association, Beijing Internet Information Office and Capital Internet Association, and jointly released by Tadpole Staff Website, Beijing Website and Sina Weibo.
Firstly, a concept is defined: fog is liquid water vapor and haze is solid particulate matter. The pollutants we are talking about are actually just smog (which can be called haze), and there is no fog. The title uses smog just to accommodate everyone's reading habits. The smog mentioned in the rumor is also wrong.
No. 1
Haze video shot by macro lens? 〗
12 On February 20th, someone posted this Weibo:
Subsequently, the video began to spread wildly in Weibo and friends circle:
Everyone was stunned by the scene in the video, but this video is not smog, it is dust. Does PM2.5 mean diameter? 2.5 micron particles. Take out your ruler. The smallest scale on it is1mm. however
1 mm = 1000 micron (? m)
If you can see the particles of 1 mm, can macro photography be enlarged by 1000 times? Is this macro photography or a microscope?
However, the air quality in the video is really not very good, so much dust also needs to wear a mask.
second
[Ammonium sulfate in smog is particularly horrible? 〗
The smog composition is complicated because pollutants will further react with each other to generate other substances after being discharged into the air. Strictly speaking, the reaction process and the final reactant of each smog cannot be exactly the same, and there are differences in types and quantities.
But according to the pollution source, it can generally be judged. Ammonium sulfate has always been the protagonist of smog in Beijing, because the main pollutants when using non-desulfurization coal are various sulfates.
But sulfate is not equal to sulfuric acid. Sulfate, a solid particle, will slowly damage the respiratory system and nervous system when inhaled into the body, but it will not kill you immediately. At that time, the large-scale air pollution deaths in London were caused by sulfuric acid fog in the air, not liquid. Without protective measures, similar to direct inhalation of sulfuric acid, it will lead to rapid death.
However, children don't go out, the purifier is always on, and it is right to drink more water.
third place
[Haze produces germs? 〗
Pathogens produced by smog? Haze is a solid particulate matter. When can solid particulate matter (inorganic matter) produce life (pathogenic bacteria)? ! In other words, smog has become the cradle of life?
The earth was born about 4.6 billion years ago, and about 3.5 billion years ago, prokaryotes such as bacteria and cyanobacteria appeared on the earth. It took 1, 654,380 billion years for the earth to evolve from inorganic substances to bacteria. I don't believe that smog can be solved in one day.
After explaining that smog can't produce germs, let's talk about smog carrying germs. There are many germs in the air. When the wind blows, they fly everywhere and are not taken away by the smog. Otherwise no one will catch it. Why did you catch a cold?
And until now, the government has not issued any statement that the smog is mixed with pathogenic bacteria, which is particularly harmful to the human body. All the harm comes from the smog itself. If you don't know the harm of smog, this video can give you a quick understanding:
fourth
Haze leads to unclear illegal shooting probe? 〗
The above is an illegal surveillance camera transmitted by the internet, but the fact is this:
?
Scene of Changping Traffic Command Center
This matter has nothing to do with fog or haze, but only with atmospheric visibility. The illegal shooting probes in Beijing are generally about 5 to 10 meters above the ground. Considering the requirement of clarity, as long as the visibility is more than 30 meters, it is impossible to see the number plate of the restricted vehicle.
So how big is the impact of the smog in these two days on air visibility?
According to the Beijing Meteorological Observatory, visibility in some areas of Beijing was less than 500 meters and visibility in some areas was less than 200 meters at 10 on the 20th. 2 1 day 6: 10, the visibility in most parts of Beijing is about 1 km, and some roads are less than 1 km. In short, it is still a long way from 30 meters.
Fifth place
Cigarette filter instead of mask? 〗
Do not use cigarette filters instead of masks for the following reasons:
1.? Cigarette filter will seriously hinder air from entering the nasal cavity, and continuous use will lead to hypoxia and even suffocation. Curious babies can try it and know how uncomfortable it is.
2.? Filter fibers may be inhaled into the lungs, causing other diseases.
3.? Although cigarette filters have not been found to have much effect on filtering PM2.5, it is precisely because they cannot filter or block tiny particles that the Ministry of Health specifically pointed out in the Report on the Health Hazards of Smoking in China? Can't cigarettes with filter tips reduce the health hazards of smoking? .
4.? Whether it can effectively purify the air, sealing is also very important. This is why the mask must not leak. Can you ensure that cigarette filters and nostrils are airtight?
truth
The air pollution caused by smog is really terrible, but rumors should never be created to increase panic.
The copyright of the content signed "Tadpole Staff" belongs to Tadpole Staff, and any media, website or individual may not reprint it without authorization, otherwise the corresponding legal responsibility shall be investigated. Please send an email to editor@kedo.gov.cn to apply for reprinting authorization or cooperation. The signed articles published on this website only represent the author's views and have nothing to do with this website. If there is any infringement, you are responsible.
Author: Tadpole Jun
- Related articles
- How about Qingdao Tiantai Culture No.1? OK or not? Is it worth buying?
- Shanghai Hongkou running route recommendation
- Please help me recommend a better children's photography shop in Dandong.
- What are the popular majors in Shandong Media Vocational College?
- Illusion photography activity
- Which letter key on the keyboard should be used to switch from the selected state to the quick shielding state?
- What is borrowing photography? Can you give me an example?
- What does SLR 70d mean?
- How to adjust the brightness of Nikon camera? I feel that the color changes greatly when I take pictures. It should be too bright. How to adjust the brightness?
- Why doesn't htc vr have a picture?