The book provides a collection of individual chapters from the participants in the OEPI project, which represent a mix of academic and practical chapters and contributions. The first part of the book is dedicated to a theoretical introduction to Organisations'' Environmental Performance Indicators and to a state-of-the-art overview in literature and practice. The second part of the book contains several chapters describing information systems and their components supporting the management of Environmental Performance Indicators, especially in inter-organizational contexts. The third part is dedicated to three case studies from practice, and the book concludes with part four, in which practical guidelines for the innovative management of Environmental Performance indicators in organizations and in inter-organizational contexts are presented.