This research investigates the correlation between green spaces and environmental quality, focusing on air pollution and noise levels in the Kolkata Municipal Corporation (KMC) area. Utilizing seven monitoring stations in varied locations, the study measures critical air pollutants such as PM2.5, PM10, NO, CO, and SO2. Additionally, nine noise monitoring stations capture day and nighttime noise levels across the city. The Normalized Difference Vegetation Index (NDVI) is employed to assess vegetation health and density, revealing a significant relationship between green cover and pollutant concentrations. Findings indicate that areas with limited green spaces, such as Ballygunge and Bidhan Nagar, exhibit pollutant levels far exceeding recommended standards, with PM2.5 and PM10 levels notably high. Conversely, regions like Thakurpukur and Jadavpur, with abundant vegetation, show substantially lower pollutant concentrations. Noise pollution analysis reveals similar trends; stations with substantial green cover, such as SSKM Hospital, consistently record lower noise levels. In contrast, concrete-dominated areas like Gol Park and Bag Bazar experience elevated noise levels. The study underscores the importance of green spaces in urban environments for mitigating air and noise pollution. Policy recommendations include expanding green infrastructure, incorporating vegetative barriers, and enhancing green designs in urban planning and redevelopment projects. Additionally, increased monitoring and public awareness campaigns are essential for promoting sustainable urban development. This research provides a compelling argument for prioritizing green spaces to improve environmental quality and public health in Kolkata, offering valuable insights for policymakers and urban planners aiming to create healthier, more sustainable cities.