**About the Editors**

#### **Piotr Gradziuk**

MSc in Agricultural Economics from the Faculty of Agriculture, Agricultural Academy in Lublin, Poland (currently under new name University of Life Sciences in Lublin). PhD in Economics, Faculty of Economics, Maria Curie-Skłodowska University in Lublin and D.Habil. in Economics, Faculty of Economics, Warsaw University of Life Sciences. From 1982 to 2015, he worked in the Faculty of Agricultural Sciences, University of Life Sciences in Lublin. He is currently employed as Associate Professor, Polish Academy of Sciences, Institute of Rural and Agricultural Development, Warszawa. Fields of scientific specialization: effectiveness of renewable energy sources utilization; socio-economic and institutional changes in rural areas; efficiency and productivity.

2018–2022, "LIFT: Low-Input Farming and Territories - Integrating knowledge for improving ecosystem-based farming" in the EU Horizon 2020 programme (ID: 770747), http://lift-h2020.eu, co-author.

2017–2021, "SURE-Farm: Towards SUstainable and REsilient EU FARMing systems" in the EU Horizon 2020 programme (ID: 727520), https://surefarmproject.eu, co-author.

2018–2021, "POWER4BIO - emPOWERing regional stakeholders for realising the full potential of european BIOeconomy" in the EU Horizon 2020 programme (ID: 818351), https://power4bio.eu, co-author.

https://www.irwirpan.waw.pl/12/team/employees/2/team/employees/2/wpis/62 https://scholar.google.com/citations?user=dcj0h7gAAAAJ&hl=en https://www.researchgate.net/profile/Piotr-Gradziuk

#### **Bogdan Klepacki**

A graduate of the Faculty of Economics and Agriculture of the Warsaw University of Life Sciences, and professor of economic sciences. Author of about 600 publications, including about 360 original papers and scientific monographs. Supervisor of 29 positively completed doctoral dissertations, including 9 habilitated doctors and 1 professor among the doctoral students. His main research areas are: economic and organizational effects of expanding the area of farms, possibilities of improving the efficiency of farming, adaptation processes in enterprises, assessment of the effectiveness of technological progress in agriculture, economic importance of logistics, with particular emphasis on agrology (logistics in the food sector).

Dr. h.c. University of Agriculture in Krakow, Honorary Professor of the Universities of Life Sciences in Kiev and Dublany (Lviv). Third term member of the Economic Sciences Committee (KNE) of the Polish Academy of Sciences, two-term chairman of the former Committee of Agricultural Economics and Rural Development of the Polish Academy of Sciences, former president of the Association of Agricultural and Agribusiness Economists (SERiA), former long-term chairman of the Scientific Council of the Institute of Rural and Agricultural Sciences (IRWiR) of the Polish Academy of Sciences.

#### **Mariusz J. Stolarski**

Professor of agricultural sciences, working at the University of Warmia and Mazury in Olsztyn (UWM), conducting research into the following: bioresources, bioeconomy, renewable energy sources (RES), biomass growing, productivity, quality, the use of perennial and annual alternative crops for energy and industrial purposes, production technology and logistics of biofeedstock acquisition and processing to obtain higher added value bioproducts and conversion to solid, liquid, and gaseous biofuels, the cascaded use of various agricultural- and forest-origin biofeedstock types, the bioconversion of various types of biomass residues by insects, the assessment of the economic, energetic, and environmental effectiveness of cultivation, production, logistics, and processing of biomaterials, and the characterization and assessment of the usability of biomass and other RES on individual, local, regional, national, and international levels. He is the co-author of over 80 original publications with the IF, and the co-author of 11 willow varieties and 1 patent. https://orcid.org/0000-0003-0712-9678;

https://www.researchgate.net/profile/Mariusz-Stolarski
