**6. Prevention and Control Measures for Tropospheric Ozone Pollution**

In a particular region, the level of tropospheric O3 depends on meteorology and the interaction between O3 precursors. The distinction of these impacts is important for evaluating the effectiveness of past emission reduction measures and clarifying the direction of future control plans [95]. In order to effectively reduce the tropospheric O3 pollution, it is necessary to strengthen the prevention and control of corresponding pollutants.


nant party. Tropospheric O3 and particulate matter interact through aerosol formation, nonhomogeneous reactions on the surface of the particulate matter and changes in the aerosol-induced photolysis rate. The relationship between PM2.5/PM10 and the atmospheric ozone is therefore complex. High PM2.5/PM10 concentrations can affect the aerosol radiative effects and the surface inhomogeneous reactions, which are also influenced by different regions and meteorology, with long-range transport of air masses bringing about cross-regional pollution of PM2.5 and O3 [99]. Long-term mitigation of PM2.5 and O3 pollution control should be addressed by optimizing the zoning of prevention and control areas and implementing local and targeted measures. Predictive simulation models and representative regional monitoring networks should be developed, and synergistic mitigation strategies for PM2.5 and O3 pollution should be explored. The effective synergistic control measures remain a difficult area for future research.
