This book provides a clear overview of sustainable and smart energy technologies. It focuses on renewable energy sources like solar, wind, and hydropower, explaining their roles in offering cleaner alternatives. It also examines smart grids and energy storage, highlighting their contributions to efficient energy distribution. The book also discusses energy conversion technologies and the integration of the Internet of Things (IoT) and their practical applications for optimizing energy management. Additionally, this book explores sustainable transportation, energy policy, and economics, emphasizing the importance of effective strategies to make green energy accessible. It discusses emerging technologies and their potential environmental impacts, showcasing real-world examples of the benefits of adopting sustainable practices