Blue sky defense battle upgrade ozone will become the focus of the "14th Five-Year" governance
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Our reporter Li He
In 2019, ozone concentration increased significantly, which is another important factor that affects the number of good days after PM2.5. Recently, at a press conference held by the Ministry of Ecology and Environment, Liu Bingjiang, director of the Department of Atmospheric Environment of the Ministry of Ecology and Environment, pointed out that compared with last year, the biggest change in air pollution control in 2020 is that in response to the increase in ozone concentration, VOCs will be implemented in summer ( (Volatile Organic Compounds) Comprehensive treatment of key actions; the “14th Five-Year Plan” special plan for the prevention and control of air pollution that has been launched has designed emission reduction targets specifically for VOCs and nitrogen oxides, two precursors of ozone.
Monitoring data shows that in 2019, ozone concentration in 337 prefecture-level and higher cities nationwide rose by 6.5% year-on-year. The number of days with ozone as the primary pollutant exceeded 41.8% of the total number of days exceeded, resulting in a loss of 2.3 percentage points year-on-year.
Liu Bingjiang said that since the Blue Sky Defence War, significant improvements have been made in air quality improvement across the country. But these goals are phased, and there is still a long time to come before the air quality standards of all cities in the country are met. "The Blue Sky Defence Warfare will continue, and an upgraded version of the Blue Sky Defence Warfare Action Plan is also being formulated."
Why is the situation of ozone pollution so severe? Liu Bingjiang analyzed that from the perspective of the cause of pollution, the emissions of ozone precursors, nitrogen oxides and VOCs are still high. VOCs have many sources of emission and are scattered, and have not been effectively controlled. Extreme weather such as high temperature and little rain is conducive to the generation of ozone. From 2013 to 2019, five years are the warmest years. The global ozone background value continues to increase, with an average annual increase of 1 microgram. Ozone concentrations in Europe, America, Japan, and other northern hemisphere countries are also increasing.
Liu Bingjiang said that in controlling VOCs and ozone pollution, time precision, space precision and industry precision should be emphasized. On the time scale, focus on the summer with severe ozone pollution, that is, June-September; on the spatial scale, focus on the Beijing-Tianjin-Hebei region and the surrounding areas, the Yangtze River Delta region, the Fenwei Plain, and the border areas of Jiangsu, Anhui, Luzhou, and Henan; Industrial painting, packaging and printing, oil storage and transportation.
"Science pollution control should also be emphasized. VOCs exist in raw materials and products. For enterprises, volatilization is a loss of profits. Effective recovery and control can increase profits. Some VOCs are flammable and explosive materials, and they can deal with potential safety hazards. Prevention and control are also very effective. "Liu Bingjiang said, the Ministry of Ecology and Environment will introduce and adopt a variety of policies and measures to guide the implementation of VOCs governance. These include paints, inks, adhesives, cleaning agents and other products that use low VOCs content as much as possible. National standards for VOCs content limits for related products have been introduced; focusing on enterprises that have installed pollution control facilities, by increasing VOCs collection rate and pollution control facilities Synchronous operation rate and removal rate ensure the improvement of overall efficiency.
From the perspective of pollution, the border area between Jiangsu, Anhui, Shandong and Henan has become one of the most polluted areas in the country. PM2.5 pollution is serious in autumn and winter, and ozone pollution is prominent in summer. Suwanluyu is the connecting belt between the Yangtze River Delta and Beijing-Tianjin-Hebei and its surrounding areas, and there is a significant transmission effect between these two key areas for atmospheric governance.
Liu Bingjiang said that Jiangsu, Anhui, Shandong and Henan border areas have concentrated nearly 80 million tons of steel, 40 million tons of coking, 140 million tons of cement, and 110 million tons of petrochemical production capacity. Half of the cities consume more than 10 million tons of coal, and the coal consumption intensity per unit area is the same as that of Beijing. The “2 + 26” cities in Tianjin-Hebei and surrounding areas are equivalent, with large basic emissions of air pollutants and difficult to control. The Ministry of Ecology and Environment will promote the establishment of a joint air pollution prevention and control mechanism in 22 cities in the border areas of Jiangsu, Anhui, Lu and Henan this year, make up for shortcomings, improve the level of governance, and accelerate the improvement of air quality throughout the region.