This project explores how the distribution and diversity of tree species across NYC’s boroughs impact air quality, focusing on pollutants like PM2.5 and nitrogen oxides (NO, NO2). Using data from open sources and visualized with Python libraries, we found that boroughs with higher tree densities, such as Queens and Brooklyn, tend to have lower pollutant levels. Specific species like Maples, Oaks, and Plane Trees showed stronger pollutant-absorbing capacities. While data gaps and other variables (e.g., population, industry) limit the analysis, the findings highlight the critical role of urban tree cover in mitigating air pollution, encouraging investment in green infrastructure for healthier city environments.