Grigorios L. Kyriakopoulos is a Teaching and Research Associate at the School of Electrical and Computer Engineering, National Technical University of Athens (NTUA), Greece. holds 2 PhDs, in Low Carbon Economy (DUTH, Greece) and in Chemical Engineering (NTUA, Greece). He (co)authored more than 100 papers at 50 journals, 20 invited book chapters, and 30 papers at conferences, all received more than 2500 citations. He is the reviewer of more than 5000 manuscripts at 350 journals. His research interests are engineering, environmental systems and remediation, energy, and renewable energy sources.