Debashish Sengupta is currently Professor at the Department of Geology and Geophysics at the Indian Institute of Technology Kharagpur. From January 2013 to December 2015 he was the Head of the same department. After completing his Ph.D. at the Physical Research Laboratory, Ahmedabad, he joined the Department as a Faculty Member in 1990. He has been involved in extensive research on applications of nuclear geophysics in Earth sciences and modelling of radiation hazard and remediation for more than thirty years. He has also collaborated with international research groups from the University of Sao Paulo, Brazil, University of Roma Tre, Italy and USGS. Brajesh K. Dubey is an Associate Professor at Indian Institute of Technology (IIT), Kharagpur, and he has more than 17 years of research, teaching, training and industrial outreach experience in the areas of integrated solid and hazardous waste management, sustainable engineering, and application of life cycle assessment techniques. Sudha Goel is currently an Associate Professor at the Civil Engineering Department, IIT Kharagpur. She completed her B.E. (1990) in Environmental Engineering at L.D. College of Engineering, Ahmedabad and MSE (1992) and Ph.D. (1996) in Environmental Engineering at Johns Hopkins University in Baltimore, US, and has been working on various aspects of environmental engineering since then.