生态环境部：臭氧污染上升趋势已得到初步控制

Core Insights - The trend of ozone pollution in China has been initially controlled, showing stability over the past three years [1][2] - Ozone concentration from January to May this year was 140 micrograms per cubic meter, a year-on-year increase of 0.7% [1] - The number of days with ozone exceeding standards reached 2,480, higher than the historical average for the same period [1] Summary by Categories Ozone Pollution Characteristics - The characteristics of ozone pollution this year include an early onset, a wide range of affected areas, and a disparity in pollution levels, with northern regions being less affected compared to southern regions [1] - The southern regions are experiencing higher temperatures and less rainfall, contributing to more severe ozone pollution [1] Future Projections - From June to September, higher temperatures are expected across most regions of China, which may facilitate the formation of ozone pollution [1] Government Response Measures - The Ministry of Ecology and Environment plans to enhance air quality monitoring networks and focus on the concentration changes of ozone and its precursors [1] - Continuous investigations and rectifications of volatile organic compounds (VOCs) will be conducted [1] - The ministry will promote ultra-low emission transformations in key industries to reduce air pollutant emissions [1] - Strengthening environmental regulation of motor vehicles is also a priority [1][2] Motor Vehicle Emissions - Nitrogen oxides from vehicle exhaust are significant precursors to ozone formation [2] - In May, the Ministry of Ecology and Environment, along with nine other departments, issued opinions to strengthen regulation in the motor vehicle emissions sector, particularly targeting heavy-duty trucks and inspection and maintenance institutions [2]