This book is a collection of peer-reviewed and presented papers from the 2025 15th International Conference on Environmental Science and Engineering (ICESE 2025). The conference was held in Yokohama, Japan during September 19?21, 2025. It brought together scholars, researchers, and practitioners in the field of environmental science and engineering in a common forum to share their insights, discuss current environmental issues, and explore innovative solutions aimed at fostering sustainability and resilience in the face of environmental challenges. The book includes topics such as global environmental change and ecosystems management, water treatment residuals, air pollution and control, carbon capture and storage, solid waste management, environmental restoration and ecological engineering, water resources and river basin management, and wastewater and sludge treatment, among others. This book is a useful resource for anyone engaged in enhancing ecological integrity and ensuring sustainable development for the earth.