This book is an insightful collection of research findings presented at the prestigious 3rd International Joint Conference on Energy and Environmental Engineering (CoEEE 2023), which took place in Stockholm, Sweden, from May 19 to 21, 2023. Co-organized by esteemed institutions such as Jiangsu University Institute of Industrial Economics, Shanghai Jiao Tong University, University of Electronic Science and Technology of China, Malmö University, and supported by Power System Protection and Control, Protection and Control of Modern Power Systems and CoreShare Academy Exchange Center, this conference brought together some of the brightest minds in the field of energy and environmental engineering. The book covers a wide range of topics, including Water and Soil Preservation, Air Pollution and Climate Change, Energy Efficiency and Clean Production, Environmental Monitoring and Analysis, Waste Management and Treatment, and Sustainable Cities and Communities. This book from leading experts in the field highlights innovative solutions and strategies developed to address pressing global challenges. Offering valuable insights into the latest technologies and future directions of the energy and environmental engineering fields, this book is a must-read for researchers, practitioners, policymakers, and students interested in these fields.