This volume offers a comprehensive and interdisciplinary examination of how contemporary legal systems are responding to two of the most urgent challenges of our time: the global green energy transition and the rapid development of new technologies, particularly artificial intelligence. The book explores the evolving role of public and private law in areas such as environmental protection, energy market regulation, AI liability, healthcare, data governance, and access to justice. It presents both theoretical and practical perspectives on how legal frameworks can promote sustainability, protect democratic values, and ensure ethical accountability in a time of profound transformation.