This content features annotated bibliographies by various authors on the role of renewable energy sources in engineering and their impact on environmental protection. It discusses the benefits of renewable energy sources, such as cost-effectiveness, environmental friendliness, and reliability. The bibliographies analyze different aspects of renewable energy sources, including their role in reducing greenhouse gas emissions, optimizing energy production, and evaluating their availability. The content also explores the socioeconomic and demographic factors that influence public awareness of renewable energy sources. It provides insights into the current status, prospects, and enabling technologies of renewable energy resources. Additionally, it discusses the utilization of waste sludge as a renewable energy source. Overall, this content provides a comprehensive overview of renewable energy sources in engineering.