**5. Conclusion**

To analyze the effect of the reduction of anthropogenic sources on PM and O3 concentrations, it is also necessary to analyze the effect of winds and other meteorological variables. Furthermore, long-range transport of pollutants and natural sources of pollutants such as wildfires or dry soils caused by drought need to be taken into account to assess the effect of policy interventions aimed at reducing anthropogenic sources of air pollutants in Greater Mexico City. According to the results of this study, during the 2020 dry season in Mexico City, there was a statistically significant reduction of PM2.5 and PM10 concentrations, but there was an increase in ozone.
