This Research Handbook presents in-depth studies on green information systems which utilise a diverse range of approaches and methods, including reviews of previous literature, experimental studies, surveys, and interviews. Chapters focus on the development and promotion of energy informatics, the use of digital technologies in the implementation of a circular economy, and the role of information systems in supporting the integration of renewable energy. This Research Handbook further analyses the ways in which digital nudging, demand response, and the impact of psychological ownership can influence consumer behaviour and encourage sustainable consumption. Tackling the issues facing information systems and the environment on an individual, organisational, and societal scale, this Research Handbook will be crucial reading for students and scholars in business ethics, environmental management, information systems, and management and sustainability. It will also be beneficial for practitioners in business management and corporate social responsibility who are interested in environmental sustainability.