Emergy assessment for depollution of the Charles de Gaulle stream in Brazil

>Objective: This study aimed to conduct an emergy assessment for the depollution of the Charles de Gaulle stream in Brazil. Methodology: A case study approach was employed, utilizing interviews and participant observation for data collection. The emergy assessment was applied to the gathered data, yielding significant results. Originality: This study addresses a critical research gap, as no literature specifically applies emergy assessment to urban stream depollution. It provides a comprehensive evaluation of the stream's revitalization and monitoring impacts, contributing to the United Nations Sustainable Development Goal 6 (SDG 6) on clean water and sanitation. Results: Emergy indicators, analyzed through sensitivity analysis, reveal improvements in ecosystem services, resource optimization, and water quality. A decrease in the stream's total emergy indicates clear environmental restoration and societal reintegration into the ecosystem. Contributions: This research demonstrates the feasibility of applying emergy assessment in urban water revitalization. The reduction in total emergy signifies environmental restoration and supports practical actions toward achieving SDG 6 focused on clean water and sanitation.