< p > today, the theme of a series of interviews sponsored by the Chongqing Association for science and technology to promote science and technology to promote people's livelihood is to "scientifically interpret the causes, hazards and prevention of haze", and invite Wang Gang Chen, a researcher and doctoral tutor of the Institute of Atmospheric Physics, Chinese Academy of Sciences, to talk with you about "a href=" //m.pmae.cn "fog haze < /a".

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< p > < strong > Chongqing is relatively less haze in summer than < /strong > < /p >.

< p > there are more foggy weather in Chongqing, especially in autumn and winter. Sometimes visibility is only a few meters.

So, is there much chance of haze in summer? < /p >

< p > Wang Gengchen said that the emergence of fog and haze is closely related to meteorological conditions. Chongqing is a special place in terms of meteorology, because it happens to be on the edge of Sichuan basin. Its East and North are basically mountains, and emissions are not good enough to emit.

Another characteristic of Chongqing is that the wind is relatively small, which makes it difficult for local pollutants to diffuse.

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< p > Chongqing is mainly affected by the warm and humid air in Southwest China. The monsoon from the India ocean is blocked by the Himalaya Range, and it can only run to this area. It follows the airstream to Sichuan basin.

So the monsoon has great influence on Chongqing, especially the summer monsoon, so the summer monsoon will be humid later, and it will easily cause precipitation.

And precipitation will alleviate the haze, so Chongqing is relatively less haze in summer.

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< p > > strong > fog and haze days long wear a href= "//m.pmae.cn" > masks < /a > not only has no advantages, but also affects lung function < /strong > /p >

< p > because people are worried about haze, many people often choose to wear masks or buy air purifiers at home. Are these methods feasible? < /p >

< p > Wang Gengchen believes that if there is more serious fog and haze, it is best not to stay outside for a long time.

But there is no way. We have to go to school and work. It's inevitable to go out.

There are many masks on the market now. Some people suggest that there are N95 and N90 medical masks to prevent PM2.5.

Wang Gengchen said, they have done experiments, N95, N90 has a certain effect, but in a short time, for example, if you enter a polluted environment, you must wear it.

But you can't wear it for 8 hours a day. I can't stand it.

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< p > medicine has done experiments in this field. Wearing masks for a long time is not only good but also bad.

Especially for the elderly and children, they are very suffocated after wearing them. Even if they can prevent PM2.5, they will have great influence on your lung function and respiratory system.

So we must treat these problems dialectically and scientifically.

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< p > Wang Gengchen suggested that traffic policemen are often exposed to vehicle exhaust, and can wear masks when they are on duty.

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< p > < strong > air cleaner should regularly check indoor air in general rather than outdoor < /strong > < /p >.

< p > for air purifier, Wang Gengchen believes that there are many kinds of purifiers and different functions.

What we need to remind you is not to think that buying is like entering a safe deposit box.

The purified purifier just bought is strong, but it will be checked over time. The purified medium will be aging and saturated, and its ability to absorb particulate matter will also gradually decrease. Even a long time may cause bacteria in the fuselage, so it should be regularly checked, replaced and activated.

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< p > some people believe that if they encounter fog and haze, staying at home without going out is a good protective measure.

But Wang Gengchen believes that, generally speaking, indoor air is worse than outdoor, especially in shopping malls, gym, KTV, conference rooms, etc. Although PM2.5 content may be smaller than outdoor, but due to the fact that many people and air are not in circulation, the other organic matter's < a href= "//m.pmae.cn/news/index_s.asp" > pollution < /a > more.

Therefore, Wang Gengchen suggested that if it is a good day, it is best to frequent outdoor exercise. If you want to exercise indoors, you must monitor whether indoor air is up to standard.

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