According to Liu Zhiquan, director of the Environmental Monitoring Department of the Ministry of Environmental Protection, the air quality of 338 cities at or above the prefecture level decreased from 1 in February, of which the average number of excellent days was 64.6%, down 4.8 percentage points year-on-year. The concentration of PM2.5 increased 12.7% year-on-year.
According to the report of the Ministry of Environmental Protection, the air quality in the Beijing-Tianjin-Hebei region 13 cities dropped significantly, and the average number of excellent days from/kloc-0 to February was 44.7%, down 1 9 percentage points year-on-year. The concentration of PM2.5 was11μ g/m3, up 48.0% year-on-year; The concentration of PM 10 was 166 μ g/m3, up 45.6% year-on-year. In February, the average number of excellent days in Beijing-Tianjin-Hebei region 13 cities was 54. 1%, down 18.0 percentage points year-on-year. The concentration of PM2.5 was 92 μ g/m3, up 55.9% year-on-year; The concentration of PM 10 was 140 μ g/m3, up 50.5% year-on-year.
Among them, the proportion of excellent days in Beijing 1 February was 54.2%, down 22.5 percentage points year-on-year. The concentration of PM2.5 was 95 μ g/m3, up 69.6% year-on-year. In February, the proportion of excellent days in Beijing was 57. 1%, down 25.7 percentage points year-on-year, and the concentration of PM2.5 was 7 1 μ g/m3, up 6 1.4% year-on-year.
Chai Fahe analyzed the reasons for the decline of air quality in Beijing, Tianjin and Hebei. He said that in addition to unfavorable meteorological factors, increased economic activities and increased pressure on air quality improvement are an important reason. According to him, since the second half of 20 16, China's industrial production and market demand have gradually picked up, and the output of major industrial products such as thermal power generation and steel, coke and flat glass has increased substantially.
Chai Fahe said that statistics show that from February 20 17 to 1, the national industrial electricity consumption increased by 6.9% year-on-year, the added value of industrial enterprises above designated size increased by 6.3% year-on-year, the production and sales of commercial vehicles maintained rapid growth, and the total social logistics in the country increased by 6.9% year-on-year, and the freight volume increased by 8.2% year-on-year. The growth rate was 7.5 percentage points higher than that of the previous year. The concentration of NO2 (sulfur dioxide) in Beijing-Tianjin-Hebei and its surrounding areas, the Yangtze River Delta region and the Pearl River Delta region increased significantly from 1 to February compared with the same period of 20 16. " Chai Fahe said that the intensity of industrial emissions remains high, which puts great pressure on the improvement of air quality.