Abstract: This work reviewed the observational status of PM2.5 and tropospheric ozone in China firstly; the distribution of the concentration of tropospheric ozone over the globe and China were given based on the satellite observation during the period of 2010-2013. The annual mean values are 29.78 DU and 33.97 DU in the globe and China region, respectively. Then, the distribution of PM2.5 concentration and their seasonal changes in China were simulated by an aerosol chemistry-climate coupled model system, with annual mean value of 0.51×10^-8 kg/m³. The contributions from five kinds of aerosols to the simulated PM2.5 concentrations in different seasons were also analyzed. Then, the relations between the emissions of aerosol, greenhouse gases and their precursors and their radiative forcings were illustrated referring to the IPCC AR5. For these relations, the possible effects of controlling ozone precursors and particle matter on the climate were given, of which, the former is not totally clear, while reducing emissions of short lived greenhouse gases and black carbon is a secondary measure for short term (the future 50 years) climate change mitigation. Reducing emission of CO₂ is still our main strategy to promise the target of global average surface air temperature rise less than 2℃. The strategies of pollutant emission control for near term and long term are all important for the prospects of both environment protection and climate change mitigation.

Key words: tropospheric ozone, PM2.5, GHG, air pollution, climate change