Dr Pardeep Singh is presently working as an Assistant Professor at the Department of Environmental Science, PGDAV College, University of Delhi, India. He obtained his master's degree from the Department of Environmental Science at Banaras Hindu University, Varanasi India in 2011. He obtained his doctorate from the Indian Institute of Technology (Banaras Hindu University) Varanasi in the year 2017. The area of his doctoral research is the degradation of organic pollutants through various indigenous isolated microbes and by using various types of photocatalytic. He has published more than 35 papers in international journals in the field of waste management. Dr Vijay Kumar is presently working as Executive Member, Society for Environment and Sustainable Development, New Delhi India. He obtained his master degree from the Department of Environmental Science Banaras Hindu University, Varanasi India in 2012. He received his doctorate from Indian Institute of Technology (Banaras Hindu University) Varanasi in 2017. His doctoral research area is biological synthesis of silver and gold nanoparticles and their environmental and biological applications. He has published more than 27 papers in the International Journals in the field of environmental nanotechnology. Mansi Bakshi works in the Department of Civil Engineering at the Indian Institute of Technology, New Delhi, India. Prof. Chaudhery Mustansar Hussain is an Adjunct Professor and Director of laboratories in the Department of Chemistry & Environmental Sciences at the New Jersey Institute of Technology (NJIT), Newark, New Jersey, United States. His research is focused on the applications of nanotechnology and advanced materials, environmental management, analytical chemistry, and other various industries. Dr. Hussain is the author of numerous papers in peer-reviewed journals as well as a prolific author and editor of around 150 books, including scientific monographs and handbooks in his research areas. Mika Sillanpää’s research work centres on chemical treatment in environmental engineering and environmental monitoring and analysis. His recent research focus has been on the resource recovery from waste streams. Sillanpää received his M.Sc. (Eng.) and D. Sc. (Eng.) degrees from the Aalto University where he also completed an MBA degree in 2013. Since 2000, he has been a full professor/adjunct professor at the University of Oulu, the University of Eastern Finland, the LUT University, the University of Eastern Finland and the University of Johannesburg. He has supervised over 60 PhDs and been a reviewer in over 250 academic journals. Mika Sillanpää has published more than 1000 articles in peer?reviewed international journals. He has served on the editorial boards of several scholarly publications. Having an h-index of 115, his publications have been cited over 65000 times (Google Scholar). Mika Sillanpää has received numerous awards for research and innovation. For example, he is the first Laureate of Scientific Committee on the Problems of the Environment (SCOPE)’s Young Investigator Award, which was delivered at the UNESCO Conference in Shanghai 2010 for his “significant contributions, outstanding achievements and research leadership in Environmental Technological Innovations to address present water pollution problems worldwide, especially with regard to wastewater treatment and reuse. In 2011, he was invited to act as a Principal Scientific Reviewer in the GEO-5 report of the United Nations Environmental Programme (UNEP). In 2012, he received Tapani Järvinen Environmental Technology Award and Publication Award of the Lappeenranta University of Technology. In 2014, he received the Science Award of the Lappeenranta University of Technology and Pro Mikkeli Award. In 2017 and 2018, he was listed as a Highly Cited Researcher by Thomson Reuters. In 2018, he was invited as a Member of the Finnish Academy of Sciences and Letters and Technology Academy of Finland. He also received Literature award from the Water Association of Finland in 2018. In 2019, 2020 and 2021, he was listed as a Highly Cited Researcher by Thomson Reuters in two different disciplines, among approximately 200 other top researchers (covering all fields of science). In 2021, he was listed as World’s Top 2% Scientist by Stanford University. In 2022, he has been awarded the Provincial Innovative Talent of Zhejiang Province, China.