Environmental degradation reflects not only technical failures in waste management but also underlying moral and spiritual crises regarding human interactions with nature. This study examines the impact of a waste bin innovation integrated with an ecotheological approach on the ecological behavior of local residents during a Student Community Service (KKN) program by the Faculty of Economics and Islamic Business (FEBI), Universitas Islam Negeri Sumatera Utara. Utilizing a qualitative observation method with a descriptive approach, the study evaluated changes in waste disposal habits, waste sorting, and community participation before and after the intervention. The findings indicate that the provision of strategically placed, clearly labeled, and color-coded waste bins significantly reduced littering and improved organic-anorganik waste separation. Furthermore, embedding Islamic ecotheological principles such as the responsibility of human stewardship (khalifah) and environmental care as a spiritual duty strengthened internal motivation and transformed environmental cleanliness into a social-religious practice. Active community participation in constructing and maintaining the facilities further enhanced local ownership. The study concludes that combining accessible physical infrastructure with faith-based values effectively fosters sustainable, community-driven ecological behavior
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