Dr. Deepanraj Balakrishnan is currently working as Research Faculty in the Department of Mechanical Engineering, Prince Mohammad Bin Fahd University, Saudi Arabia. He has extensive teaching and research experience and has contributed to numerous works from publishers of international repute as an author and editor. His area of interest includes Renewable Energy Utilization; Energy Conservation and Waste Management with special focus on Bio-Energy.Dr Prabhakar Sharma is currently working as Assistant Professor in the Department of Mechanical Engineering, Delhi Skill and Entrepreneurship University, India. He has 13 years of academic experience and 15 Years industrial experience in the aviation sector. His research interests include renewable energy, hydrogen energy, Machine learning, and Optimization. Dr. Ali Hussain is working as an Associate Professor in the Institute of Zoology, University of the Punjab, Lahore, Pakistan. He is a leading Microbial Biotechnologist. Energy and environment are the key domains of his research. His current research interests include microbial conversion of agro-industrial wastes into bioenergy, and molecular ecology and biotechnology of the microbes responsible for the efficient bioremediation of various industrial effluents. Microbial groups of special interest to him are methanogens, microalgae, hydrogen-producing, and sulfate-reducing prokaryotes. He has more than 125 articles in different international journals, and 6 book chapters in edited books to his credit. He is also the Associate Editor of BMC Microbiology.