In a world increasingly vulnerable to climate change, this study examines the role of environmental taxes and productive capacities in mitigating environmental degradation in the European Economic Area (EEA). Using advanced econometric techniques, specifically the Cross-Sectionally Augmented Autoregressive Distributed Lag (CS-ARDL) model and the Dynamic Common Correlated Effects (DCCE) model, this study utilizes panel data across EEA countries to understand the nuanced effects of economic growth on CO₂ emissions. The results reveal an inverted U-shaped relationship, known as the Environmental Kuznets Curve (EKC), between GDP growth and environmental degradation, suggesting that emissions initially rise with GDP but decline after a certain economic threshold is reached. The results also show that environmental taxes have a significant negative correlation with CO₂ emissions, while productive capacities have an even stronger impact on reducing emissions. These findings suggest that policies focused on increasing productive capacities, in addition to taxing emissions, could significantly contribute to environmental protection efforts in the EEA.