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Analyzing the self-sufficient Danish island of Sams , this book explains sustainability through a biogeophysical understanding of how to best use Earth's limited resources to achieve true sustainability. The method used derives from the thermodynamic function of exergy. By analyzing exergy flows and establishing a system for evaluating the energy and the materials used in a society, the author creates a platform for monitoring certain indicators of sustainability. These indicators inform readers about the actions that must be taken, and the timeframes for achieving sustainability goals. Exergy-based approach is an important tool for carrying out such analysis.

• Focuses on several key thermodynamic concepts and the usefulness of exergy analysis for evaluating sustainability
• Explains sustainability by implementing thermodynamic laws to societal consumption and the use of resources
• Discusses new methods that integrates energy and material fluxes and evaluates them against each other
• Provides direct indicators for finding the largest problems/obstacles and deciding where measures should be taken
• Includes instructions on how to establish an accounting system for evaluating the energy and the materials used in a society

This book is aimed for professionals, researchers, and students working on nature conservations and environmental management projects related to sustainability.

Søren Nors Nielsen obtained the PhD in Structurally Dynamic Modelling in 1992, in the University of Copenhagen, and the ＂Agregação＂ in 2009, in the University of Coimbra. He is a world expert on the application of thermodynamic methods for the analysis and assessment of biological systems functioning, mainly in aquatic environments, and of ecological modeling in environmental management. He authored or co-authored a large number of papers in peer review journals, book chapters and books.