Dr. Umesh Chandra Dumka (ARIES, Nainital, India) is working as a Scientist-E in the Atmospheric Science Division, at ARIES, Nainital, India. He completed his Ph.D. in 2008 and had four years of post-doctoral experience. In 2011, he joined as a scientist at ARIES, Nainital, India. Since then, he and his group are actively involved in the in-situ measurements of aerosol optical and physical properties. His scientific interests cover a wide range of topics in atmospheric chemistry and physics from in-situ and remote sensing of atmospheric aerosols, aerosol chemistry, and climate to optical and microphysical properties of aerosols including carbonaceous aerosols with emphasis on elemental carbon, black/brown carbon and organic carbon, secondary aerosol formation, and air pollution, and aerosol-cloud-climate interactions, extreme phenomena such as biomass burning and dust storms, solar/renewal energy, etc. Dr. Balram Ambade (NIT Jamshedpur) is working as an Associate Professor in the Department of Chemistry. He completed his Ph.D. in 2010 and started teaching at various reputed Engineering Colleges in India. In 2011 he joined IISER Bhopal as Post-Doc. Research Associate and in 2012 he joined NIT Jamshedpur as an Assistant Professor of Chemistry. Since then, his group has actively engaged in analyzing Environmental and Atmospheric Chemistry, Black carbon and Climate change, and PAHs in the atmosphere. He has mentored five graduate students, served as the principal investigator on six reputable funded projects, and written four books that have received international acclaim. His research team is heavily interested in Environmental Chemistry and Atmospheric Chemistry.