Regenerative and Positive Impact Architecture : Learning from Case Studies This book is a guide to energy efficiency and environmental impact assessment in high performance buildings projects. It compares four state of the art buildings to examine the steps needed for a transition from negative impact reduction architecture to positive impact regenerative architecture utilizing life cycle analysis. The book provides a solid grounding in the areas of energy efficient building and building materials life cycle assessment discussing carbon efficiency within a wider context that includes its technical socio cultural and environmental dimensions and covers the key areas for green buildings performance (operational and embodied energy). The analysis and comparison of four case studies of state of art modern building projects in Europe and North America serve as inspiring examples for architects and building professionals in the fields of high performance buildings ecological materials and carbon efficiency 1.Introduction 2.Modern History of Sustainable Architecture 3.Definitions and Paradigm Shift 4.Indicators and Metrics of Regenerative Design 5.Case Study 1 (energy efficiency paradigm) 6.Case Study 2 (regenerative paradigm) 7.Performance Comparison and Quantification 8.Regenerative and Positive Impact Architecture Roadmap