**About the Editors**

**Csaba Fogarassy** is an environmental management engineer, Director of the Climate Change Economics Research Center at Szent Istvan University, and founding member and secretary of the Interdepartmental Committee of the Circular Economy of the Hungarian Academy of Sciences. He obtained his PhD in 2000 on the study of energy crop cultivation and then, in 2014, in the field of business management, dealing with game theory modeling of sustainability in his second PhD dissertation. He is currently working on the design of material and energy-saving business models for the circular economy. He has carried out numerous sectoral surveys in recent years on linear circular transformation processes. He is committed to helping develop circular economic plans for developing countries. Csaba is obsessed with Rubik's cube and poetry, having so far published three volumes of his own poems. He also plays a significant role in charity programs, being the Vice Governor of Hungary's Lions Club in 2020/2021. Email: fogarassy.csaba@gtk.szie.hu.

**J ´ozsef Popp** is Professor and Dean at Szent Istvan University, Faculty of Economics and Social ´ Sciences, Hungary. He is Professor at WSB University, Dabrowa Gornicza, Poland, and North-West ´ University, South Africa. He is also an active member and chairman of several academic and professional organizations. Professor Jozsef Popp obtained his PhD in Economics at the Hungarian ´ Academy of Sciences and his Dr. Sc. oec. degree at Humboldt University, Berlin, Germany. He is a corresponding Member of the Hungarian Academy of Sciences. His research interests include global food and energy security analysis, competitiveness of the food economy, rural development, supply chain management, renewable energy, bioeconomy, and circular economy. Among the honors he has received are Doctorem Honoris Causa Pannon University, Hungary, 2010, and Honoris Causa Professorship, Delhi School of Professional Studies and Research, 2010, and Award of the Hungarian Academy of Sciences in Recognition of Research Contributions, 2011. https://www.scopus.com/authid/detail.uri?authorId=56031677900.

**David Christian Finger** is a professor, consultant, and researcher at Reykjavik University in Iceland, where he teaches sustainable engineering (courses in Hydrology, Water Management, Environmental impacts, Life Cycle Analysis, and Natural Resources Field Courses) and focuses his research on sustainable development and nature preservation. David has worked in Switzerland, USA, Japan, Kirgistan, Nepal, and the Balkans. He is the founder of the Sustainability Institute and Forum (SIF) of Reykjavik University. More information can be found on his homepage: https://fingerd.jimdofree.com/.
