Dr. Ahindra Nag, Ph.D., MICHE, FIC, DME, is a Professor in the Department of Chemistry, IIT, Kharagpur. He has thirty years of teaching experience and three years of experience in industry as Chief Project Officer. He served as a Visiting Professor in University of Molish, Italy, Academia Sinica, Taiwan, and Texas University, USA. Dr. Nag has published hundred research papers and authored/edited fourteen textbooks. He has also made three important industrial patents. He is the editorial board members of different reputed journals and secretary of Green Chemistry Society.