Dr. Selvam Sekar, as an Assistant Professor, a Teacher, and a Researcher, is working at the Department of Geology, V.O. Chidambaram College, Tuticorin, Tamil Nadu, India. He received a Gold Medal for a master's degree in geology from Manonmaniam Sundaranar University, Tirunelveli, India in 2009, and a Ph.D. at the same university (Studies on Environmental Impact Assessment, Human Health, and Evaluation of Groundwater Pollution in and around Tuticorin, Tamil Nadu, India) in 2013. He focuses on coastal and inland groundwater monitoring and pollution remediation in soil and water. Special attention is given to SGD, RS, GIS, microplastics, nutrients, and toxic metals. He works with many collaborators from different countries including the Republic of Korea, Mexico, Germany, Kuwait, Malaysia, Iran, Bangladesh, Vietnam, Japan, South Africa, Ethiopia, United Kingdom, and India.