This book will highlight the role of CE in the sustainability field as it is expressed in the various fields and disciplines and its contribution to building a sustainable society by providing a better understanding of the relevant social and cultural structures and the need for cross-disciplinary knowledge and diverse skills. Such an integrated approach which combines the concept of sustainability in the engineering field to create a CE, has not yet been presented in detail in the published literature, and there are only scattered studies covering only small parts of this holistic approach. Hence, this book will represent a single reference that will provide summarized information and state-of-the-art knowledge on this topic of the future. The book will include chapters showcasing/investigating the relation between circular economy principles and their realization in different engineering fields. This includes theoretical justification, research studies and full-scale case studies. The approach focuses on two distinct levels: macro and micro, on both production and consumption sides.