Part 1. The Emergence of Green Business Models -- Purpose of this Work and Research Approach -- Part 2. Theoretical Foundation of Green Business Model Transformations -- Environmental Sustainability in Business -- The Business Model Concept as a Unit of Analysis for Management Science -- Towards a Taxonomy of Green Business Models -- Organisations, Change, and Innovation -- Part 3. -- A Survey on Green Business Model Transformations -- Managerial Implications of Survey Results -- Managing Green Business Model Transformations -- A Framework for Management Practice -- -- Part 4. Conclusion and Outlook -- Conclusion and Outlook.