Md Firoz Khan is an Environmental Chemist working as a senior lecturer at the Department of Chemistry, Faculty of Science, University of Malaya (UM) in Malaysia since December 2018. He is also a visiting professor at the China University of Mining and Technology in China for a period of 2019-2022. He received his Ph.D. degree in Risk Management and Environmental Sciences from the Yokohama National University, Japan in 2010 as a Monbukagakusho Scholar (Japanese Government Scholarship). Prior to this, he received an M.Sc. in Air Pollution from the University of Birmingham, UK in 2004. During his university course, he studied at the University of Dhaka in Bangladesh where he received his B.Sc. and M.Sc. degrees in Chemistry in 1994 and 1995, respectively. After his Ph.D. he conducted a post-doctoral research at the University of Tokyo, Japan during 2010–2011, then he joined the Centre for Tropical Climate Change System at the National University of Malaysia (Universiti Kebangsaan Malaysia) in Malaysia as a senior lecturer (Assistant Professor) and remained at this position till November 2018. His research interests cover a wide variety of topics in air pollution, source apportionment, environmental analytical chemistry and human health risk factors of the pollutants. Currently, he leads a research group focusing on air pollution with a number of students at undergraduate, postgraduate and Ph.D. level. He is the author / co-author of more than 100 journal papers, book chapters and a book. Dr. Khan is serving as an Associate Editor to Elementa: Science of the Anthropocene (UC Press, Impact Factor 4.21) and Arabian Journal of Geosciences (Springer, Impact Factor 1.32).