Professor Marcin Dębowski works in the Department of Environmental Engineering at the University of Warmia and Mazury in Olsztyn, Poland. He is Director of the Institute of Environmental Engineering and Protection and chairs the Scientific Council for Environmental Engineering, Mining and Energy. He is a member of the Committee on Environmental Engineering of the Polish Academy of Sciences. He received the title of professor in engineering and technical sciences in 2019 and was included in the single-year category of the World’s Top 2% Scientists ranking in its 2023, 2024 and 2026 editions. His research spans environmental biotechnology and the conversion of photosynthetic biomass into renewable fuels. He studies microalgal cultivation for wastewater treatment, nutrient recovery and carbon dioxide capture and evaluates microalgae and aquatic plants as feedstocks for anaerobic digestion. His work on lignocellulosic energy crops examines how harvest timing, biomass composition and ensiling affect methane yield and the energy and economic performance of biogas production. He has experience in pilot-scale trials, process optimisation and the commissioning of agricultural biogas plants.