Opeyemi Anthony Amusan obtained his Engineering Bachelor degree in Nigeria before proceeding to Germany for his post-graduate degrees with fellow/ chartered membership of several professional bodies across the globe. He has served in various technical, research, and managerial positions since 1995. He is a value-driven, idea-oriented passionate solutions provider, transformational leader, missionpreneur, and owns ARK/ WABRAL-C12 Intercontinental. A top-notch researcher at the University of South Africa CSET-SEFT, University of Ibadan, Development Impact West Africa CEGA-GIMPA-UGBS, etc, with several publications to his credit. Seasoned global reach Technocrat consulting for several local and international organization/ institutions with experience in advancing sustainable technologies/ innovations/ resources, development policies and ideas.Charles Mbohwa is Distinguished Professor of Sustainability Engineering and Future Technologies at the College of Science, Engineering and Technology, at the University of South Africa, Florida Campus. He is currently the Leader of the Centre for Sustainability Engineering and Future Technologies. He was previously the University of Zimbabwe Pro-Vice Chancellor responsible for strategic partnerships and industrialization. Before that he was a professor and a visiting professor of sustainability engineering in the Faculty of Engineering and the Built Environment at the University of Johannesburg and Professor Extraordinaire at the Tshwane University of Technology in South Africa. He was a mechanical engineer in the National Railways of Zimbabwe from 1986 to 1991, and lecturer and senior lecturer at the University of Zimbabwe from 1991 to 2007. He was Senior Lecturer, Associate Professor, and Full Professor at the University of Johannesburg from 2007 to 2019. He was Chairman and Head of Department of Mechanical Engineering at the University of Zimbabwe from 1994 to 1997; he was Vice-Dean of Postgraduate Studies Research and Innovation in the Faculty of Engineering and the Built Environment at the University of Johannesburg from July 2014 to June 2017 and Acting Executive Dean in the Faculty of Engineering and the Built Environment from November 2017 to July 2018. He was a special advisor to the Dean after that until the end of 2018. He has more than 1000 publications. He holds a BSc Honours in Mechanical Engineering from the University of Zimbabwe in 1986; Master of Science in Operations Management and Manufacturing Systems from University of Nottingham 1992; and a Doctor of Engineering from the Tokyo Metropolitan Institute of Technology 2004.

• 1. The Genesis 2. The Concepts and Theories 3. The Methods and Framework 4. Perceptions, Prospects, and Practices 5. Circular Recovery Generation (ReGen) 6. The Circularity Impact – Relationship 7. The Concluding Outlook