Prevention and control of PM2.5 inside and outside the door must be valued

At the national PM2.5 pollution prevention and control conference on indoor environment held on February 28, Song Guangsheng, director of the China Indoor Environment Monitoring Working Committee, expressed his own confusion: “Recently, we often received calls to test indoor PM2.5. It is very difficult. We can certainly detect it. However, there is no standard in this area. After the inspection, what is the report?”.

March 1 this year marks the 10th anniversary of the official implementation of China's indoor air quality standards. It is this standard that first introduced the concept of indoor air quality in our country. In the past decade, under the guidance of this standard, the awareness of environmental protection in the entire society has greatly increased, and the technology of indoor environmental monitoring in China has continued to develop. The indoor environmental protection industry has formed a scale.

Song Guangsheng said that the implementation of the standard for 10 years, it is time to discuss the revision of it, such as PM2.5 control indicators, according to his understanding, many experts believe that it should be added to the standard.

Chinese Academy of Engineering Hou Li'an said that PM2.5 has not only harmed human health, but also affected our traffic safety and travel problems. It has been common for airplanes to postpone their delays under hazy weather. In February last year, the State Council issued a newly revised ambient air quality standard, which is the air quality standard. The inclusion of PM2.5 in the monitoring area has been affirmed and endorsed by the community. However, a new problem has emerged with it. In many cities, including Beijing, PM2.5 is almost impossible to achieve in a short time. On this point, the government and research workers have reached a consensus.

More than 70% of human time is spent indoors. If outdoor air quality, especially PM2.5, is not up to standard, how to maintain and create a good indoor environment and make PM2.5 as low as possible? Hou Lian believes that this is It is a very arduous task before the broad masses of science and technology workers. He believes there are two urgently needed tasks:

The first is the revision of the standard. It is hoped that consensus will be formed through the discussion of everyone and the PM2.5 prevention and control indicators will be included in the new standards. In some countries in Europe, indoor and outdoor air quality is implemented as a standard, but since China has divided it into two standards, then how does PM2.5 in the indoor standard be limited, in terms of our technology and monitoring capabilities? How much is appropriate, these issues need to be explored.

The second is to speak with data. At present, the monitoring, monitoring, and assessment data of PM2.5 pollution sources for indoor air quality in China are relatively few. Some of them were previously done, but they are not systematic and incomplete. We can now conclude that when the haze in the atmosphere is very serious, indoor PM2.5 may be slightly lower than the outdoor level. However, when the outdoor air quality is relatively good, indoor air-conditioning, cooking, smoking, etc., including furniture, VOC, formaldehyde and other pollution sources, PM2.5 may be higher than the outdoor atmosphere. However, the specific data is incomplete. It should also strengthen monitoring and strengthen data analysis. In addition, a portable, indoor PM2.5 monitoring instrument capable of real-time on-line monitoring and affordable for the general public should be developed. There are some foreign countries, but how to adapt to our national conditions, can really make this thing into millions of households, put it into the room, you can know how much PM2.5. This is what scientific researchers need to do.

According to Xiao Xiaofei, Director of the Standards Division of the Department of Science and Technology of the Ministry of Environmental Protection, there are many factors affecting indoor air quality. It is related to the outdoors and also relates to interior decoration, indoor furniture and people’s living habits, and supervision is not easy. Indoor air quality standards are recommended standards, and different from air quality standards are mandatory standards. If the atmospheric air quality is not up to standard, the government must try to push it to reach the standard strongly. However, if your home is not up to the standard, it is not possible to reach you in your home to allow you to reach the standard. There is such a difference. However, he personally believes that the standard of indoor air quality in the community will certainly be more and more attention. With the improvement of people’s economic conditions, we all hope that we can have a good living environment. Especially when we spend a lot of time indoors, we believe that everyone has more attention to indoor air quality.

Lou Xiaofei said that experts hope to amend indoor air quality standards as soon as possible, especially to increase the PM2.5 index, which he strongly agrees with. PM10 indicators already exist in the existing standards. PM2.5 is within PM10. In a sense, the extension of the PM10 index can achieve the purpose of PM2.5 control. The reason why PM2.5 was proposed as a separate indicator was that long-term research by some experts, including the World Health Organization, found that PM2.5 is more harmful to human health.

Hao Wei, deputy secretary-general of the China Environmental Protection Industry Association, said that the standards need to be revised, but to completely solve the PM2.5 problem requires the efforts of the entire society, not just one standard or one or two government measures. The government has to invest in planning, adjustment of industrial structure, and pollution prevention and control projects. The common people must also start from their own. For example, driving as little as possible, cooking in the family should not be so hot, and the temperature can be lower, including indoor smoking problems. For example, American law stipulates that smoking is not allowed in the hotel, smoking will alarm, and so on. In this regard, it is also necessary to step up publicity so that the people know how to protect themselves.