What is the chief culprit in the outbreak of heavily polluted weather?

Extremely serious pollution has enveloped more than 30 cities, of which 10 is located in the northeast.

Gong, director of the atmospheric room of China National Environmental Monitoring Center, told reporters on the evening of 6 th that from 2 to 6 October, a large-scale heavy pollution process occurred in Northeast China, North China and East China, and the air quality index (AQI) in Northeast China 10 cities was out of the chart.

In air testing, the highest value of air quality index is 500, which is above 500 outside the chart.

Among them, Harbin is the most polluted city. On the 4th, the daily average and hourly value of PM2.5 reached 704 μ g/m3 and 128 1 μ g/m3 respectively, and the hourly value of PM2.5 in Daqing also exceeded 1000 μ g/m3.

From the night of the 5th to the morning of the 6th, affected by pollution transmission in Northeast China, Yantai, Weifang, Qingdao, Rizhao and Zaozhuang in Shandong Province, Xuzhou and Suqian in Jiangsu Province, Huaibei City and Bozhou City in Anhui Province successively suffered from serious pollution. The process of heavy pollution in Beijing, Tianjin and Hebei and its surrounding areas is mainly concentrated in Hebei, Beijing, Tianjin and Shanxi, among which many cities in Shanxi have experienced long-term heavy pollution.

The "culprit" of large-scale heavy pollution: industrial and motor vehicle emissions and winter heating "The main reason for this large-scale heavy pollution weather is that the air pollutant emissions exceed the standard, and unfavorable meteorological conditions are important incentives." Chai Fahe, a researcher at china environmental science Research Institute, told the reporter that there has been a large-scale extreme pollution weather process in winter in Northeast China for four consecutive years. Local coal-fired heating and biomass burning emissions in winter are the "culprits" leading to this large-scale regional heavy pollution.

The main sources of heavy pollution in Beijing-Tianjin-Hebei region are industrial and motor vehicle emissions, and organic components and nitrates are still the main components of PM2.5 in this process.

Ministry of Environmental Protection 12 Inspection Team: Enterprises' excessive emissions are outstanding.

165438+ 10 Since 2 October, the Ministry of Environmental Protection has dispatched 12 inspection team to carry out continuous supervision on key areas in Beijing, Tianjin, Hebei, Shandong, Heilongjiang, Jilin, Liaoning, Jiangsu and other provinces and cities. On-site inspection found that there are still some outstanding problems in the response process in various places.

First, there is a general lack of forecasting ability for heavily polluted weather, and emergency plans for heavily polluted weather in some cities are not perfect and the response level is low. For example, Tongliao City, Inner Mongolia, the AQI index continued to reach 500 in these two days. Under the supervision of the environmental protection department, a blue warning was launched.

Second, the problem of corporate emissions is still outstanding. The independent heating coal-fired boilers in the three northeastern provinces are basically not equipped with denitration facilities, and some small and medium-sized cities are not even equipped with desulfurization facilities. The problem of exceeding the standard is outstanding. Non-point source pollution control is not in place.

"To control air pollution, we should focus on improving the pertinence of prevention and control measures in winter, and pay attention to pollution prevention and control such as residents burning coal, heating facilities and straw burning in the open air. "Chai Fahe stressed that at present, the Ministry of Environmental Protection requires all coal-fired power plants in the Beijing-Tianjin-Hebei region to achieve ultra-low emissions and peak-shifting production of heavily polluting industrial enterprises, and continue to promote energy structure adjustment to ensure that Beijing and surrounding cities do not have extremely heavy pollution explosions. However, other regions lack the support of major emission reduction measures, and there is still the possibility of leaving the list.

Chai Fahe also suggested that it is necessary to strengthen the joint prevention and control of regional air pollution, improve the working mechanism of joint prevention and control, clarify the mutual influence of various places, and earnestly implement responsibilities. Improve the emergency plan for heavily polluted weather as soon as possible. Taking the protection of public health as the fundamental goal, we should lower the early warning threshold of heavily polluted weather, improve the forecasting ability, improve the emergency plan, and realize effective emission reduction by emergency measures. In case of extremely polluted weather, effective control measures should be started immediately.