Table of contents : Intro Contents Chapter 1: Circular Cities Solution with Biophilic Design and Nature-Based Solutions 1.1 Introduction 1.2 From the Theory of Biophilia to Biophilic Design 1.3 Biophilic Design and Nature-Based Solutions 1.4 Biophilic Design and Nature-Based Solutions in Circular Cities 1.5 Conclusion References Chapter 2: The Role of Multipurpose NbS Interventions in Increasing the Circularity of Cities 2.1 Introduction 2.1.1 Urbanization and Climate Change 2.1.2 Nature-Based Solutions (NbS) and Their Advantages in the Urban Environment 2.1.3 Sustainable Development and NbS 2.1.4 Circularity of Cities and NbS 2.1.5 Urban Farming as a Multidisciplinary NbS 2.2 Materials and Methods 2.2.1 Selected NbS 2.2.2 Fuzzy Scale 2.3 Results and Discussion 2.3.1 Contributions of the NbS Units to SDGs 2.3.2 Connections Among the Selected NbS and SDGs 2.3.3 Increasing the Sustainability Rate of NbS Through Multidisciplinary Interventions 2.3.4 Calculation of TCS, TSS, and TS for Selected NbS and Multidisciplinary NbS 2.4 Conclusion 2.4.1 Recommendations for Future Studies References Chapter 3: Nature-Based Solutions for a Circular Water Economy: Examples of New Green Infrastructure 3.1 The Rising Era of Circular Economy 3.2 Water as a Resource in Circular Economy 3.3 Nature-Based Solutions for Circular Water Management 3.4 NbS Examples 3.4.1 Onsite Wastewater Treatment and Reuse 3.4.2 Sludge Treatment and Reuse Using Sludge Treatment Reed Beds 3.4.3 Wastewater Treatment and Reuse at a University Dormitory 3.4.4 Manufacturing Industry Wastewater Treatment and Reuse 3.4.5 Onsite Wastewater Treatment and Reuse in Agriculture 3.5 Conclusions 5.2 Rain Garden Design Principles 5.3 Research Objective 5.4 The Research Method 5.4.1 The First Stage, Determination of the Parameters 5.4.2 The Second Stage, Statistical Analysis 5.4.3 The Third Stage, the Design of "the Sample Rain Garden" 5.5 Findings 5.5.1 AHP Analysis Findings 5.5.2 Sample Rain Garden Design 5.6 Discussion 5.7 Conclusion References Chapter 6: A Study of Nature-Based Solutions via a Thematic Analysis of the Stakeholders' Perceptions to Address Water Scarcity in a Hot and Semiarid Climate: A Case Study of Iran 6.1 Introduction