Chayan Kumer Saha is a professor at the Department of Farm Power and Machinery, Bangladesh Agricultural University, Bangladesh, where he has been involved in teaching and research for the last twenty years. He earned his PhD in environmental technology from Aarhus University, Denmark, and completed his post-doc research under the Department of Engineering for livestock management, Leibniz Institute for Agricultural Engineering and Bio-Economy (ATB), Germany, with the Alexander von Humboldt fellowship. He was a visiting scholar at the Asian Institute of Technology (AIT), Thailand and Purdue Agricultural Air Quality Laboratory, Purdue University, USA. His research interest engulfs a wide range of topics, including renewable energy; circular agricultural production system and bio-economy; drying and storage of grain, fruits, and vegetables; technology for livestock management; computational and experimental aerodynamics and mass transfer modeling; life cycle assessment; control environment agriculture, etc.