What are the causes of heavy air pollution in staggered production this fall and winter? Response of the Ministry of Ecology and Environment | Ministry of Ecology and Environment_Sina Finance_Sina.com

Original title: Will peak production fall this year and winter? What are the causes of heavy air pollution? Response of the Ministry of Ecology and Environment

Source: Information Office of the State Council

　　Text | State Information Office

On September 11, the State Council Information Office held a periodic briefing on State Council policies to help win the blue sky defense war with science and technology. A reporter asked at the meeting, through the investigation of key projects, what are the main causes of air pollution in autumn and winter in and around the Beijing-Tianjin-Hebei region?

Zhao Yingmin, Vice Minister of the Ministry of Ecology and Environment, said that, in summary, four factors have worked together to provoke the occurrence of a severely polluted climate in the region:

First, the discharge of pollutants exceeds 50% of the environmental capacity, which is the root cause of frequent heavy pollution.

The second is the high concentration of nitrogen oxides and volatile organic compounds in the atmosphere, resulting in increased atmospheric oxidation, which is a key factor in the rapid rise in secondary PM2.5 during heavy pollution.

Third, unfavorable climatic conditions have led to a significant reduction in regional environmental capacity, which is a necessary condition for the formation of highly polluted climatic conditions.

Fourth, regional transmission has a significant impact on PM2.5. The average contribution rate of each city is about 20% -30%, and it increases further to 35% -50% during heavy pollution.

Zhao Yingmin said that these four reasons overlap with each other, resulting in the occurrence of heavy pollution in the region in autumn and winter. Better governance consists of focusing on man-made emissions and greatly reducing pollutant emissions, so that even if extreme adverse weather conditions are encountered, severe pollution will not occur again.

Zhao Yingmin said that the cause and treatment of heavy air pollution have been organized through a combination of centralized investigation and station monitoring. After three years of hard work, a lot of important scientific and technological breakthroughs and research results have been achieved. There are six main aspects:

First, through large-scale scientific observations and experimental studies, and by adopting a multi-technology integration method, based on the four aspects of pollutant emission, chemical transformation, meteorological conditions and pollution transmission, the causes and sources of intense regional air pollution. Broad scientific consensus.

The second is to build the country’s largest comprehensive air-space-ground three-dimensional observation network and data exchange platform, establish a regional comprehensive system of PM2.5 comprehensive source analysis methods, and form a dynamic analysis capability. quantitative and refined for high contamination processes.

The third is to establish an inventory of regional and urban emissions of high temporal resolution, find out the current status of regional emissions of pollutants, the characteristics of the main emissions of air pollutants and the rules of temporal and spatial changes, and accurately identify regional cities “2 + 26” and key industries. Key issues have formed a technical system to accurately identify and manage key issues in key cities and industries.

The fourth is to establish a “prediction and forecast-consultation analysis-early warning and emergency response-follow-up evaluation” the entire process of the response technology system to intense pollution weather conditions, present a control and management technology plan emergency management, fully support regional emergency linkage and differentiated management and control, and strongly support emergency reduction Maximize drainage efficiency.

Fifth, an algorithm has been established for the regional atmospheric environmental capacity restricted by the target concentration of PM2.5, a technical support platform has been developed for scientific decision-making for the prevention and control of air pollution. and regional policies for the prevention and control of air pollution have been proposed in the medium and long term.

Sixth, a comprehensive application of multiple technologies and data analysis methods has quantitatively evaluated the health effects of airborne particulate pollution and the health benefits of pollution prevention measures.

Regarding the differences between the actions to combat air pollution in this fall and winter of previous years and whether companies will be required to carry out staggered production, Zhao Yingmin replied that the economic and social recovery after the epidemic it is both a challenge and an opportunity. We must firmly pursue the path of high-quality development, implement new development concepts, and promote high-quality economic development through high-level protection of the ecological environment.

He said that the Ministry of Ecology and Environment will implement accurate pollution control, scientific pollution control and pollution control in accordance with the law, adhere to the core of reducing people’s heavy pollution, and continue to promote comprehensive control of air pollution in key areas in autumn and winter. The implementation of the various blue sky defense war tasks and measures that have been issued will consolidate the air quality improvement results that have been achieved, and will not incur a layer-by-layer overweight, and will implement the responsibilities departmental and local.

Editor in Charge: Xue Yongwei