This book is an outcome of the 37th International Conference EnviroInfo 2023, held at the Leibniz Supercomputing Centre (Munich, Germany), organized by the technical committee for Environmental Informatics of the German Informatics Society. It explores the fusion of information and communication technologies with environmental sustainability. As a flagship edition of the EnviroInfo conference series, it showcases the latest advancements in applied informatics and environmental informatics. With a focus on "Towards a Sustainable Digital Society," the conference presents innovative research on topics such as green computing, sustainable software engineering, and digital transformation. The proceedings cover essential subjects for shaping a greener future, including energy-efficient workloads, environmental management systems, legal frameworks, Earth observation, and geographical information systems. It also examines emerging technologies like robotics, AI, and reinforcement learning, highlighting their applications in environmental informatics. From citizen science to disaster risk modeling and sustainable resource management, the book explores the interdisciplinary nature of environmental informatics. It also addresses societal aspects, including its role in developing countries. This resource is essential for researchers, professionals, and policymakers seeking to leverage ICT for addressing environmental challenges and building a sustainable digital society.