Benedetto De Vivo, graduated at Univ. Napoli Federico II, Italy, in Geological Sciences in 1971. He is currently Full Prof of Environmental Geochemistry at Univ. Online Pegaso, Napoli; and Adjunct Prof. at: Virginia Tech, Blacksburg, VA, USA; Nanjing University and Hubei Polit. Univ, Huanghshi, China; and Member of Excalibur Group, New Market, MD, USA. From 1971 to 1976, worked for private companies operating in Italy and abroad; Researcher at CNR, Rome (1976-1987); Associate Prof (1987-2000) and Full Prof (2000-2017) in Applied Geochemistry at Univ. of Napoli Federico II. He was Chief Editor of: J. Geoch. Explor. (Elsevier) from 2007 to 2016, and Geochemistry-Exploration, Environment, Analysis (Geol. Soc. London) from 2017 to 2018. He has published 300 papers; 30 educational publications; 33 Monographs; and has edited 36 special volumes of peer review journals; 7 textbooks in geochemical prospecting and environmental geochemistry. Recipient of the 2019 Gold Medal of the Association of Applied Geochemists. Harvey E. Belkin is currently a Research Geologist Emeritus for the U.S. Geological Survey, Reston, Virginia, USA. After a career of more than 45 years, the position of Emeritus allows continued research. After majoring in geology and geochemistry at Franklin and Marshall College and George Washington University, he joined the Branch of Experimental Mineralogy and Geochemistry, USGS. During the early part of his career, he applied the study of aqueous and silicate-melt inclusions to address problems in a wide variety of earth environments, such as ore deposits, radioactive waste disposal, and volcanology. The latter part of this career involved human health issues related to domestic use of coal and other earth materials as well as continued research in different aspects of mineralogy, petrology, geochemistry, and volcanology. The author or co-author of more than 150 peer-reviewed papers, more than 200 presentations, and editor or co-editor more than 20 books and abstract volumes, Harvey Belkin continues research in a wide variety of geologic problems, especially the petrology, mineralogy, and geochemistry of Italian volcanism. Giuseppe Rolandi studied at the Univ. of Napoli Federico II and graduated (Laurea) in 1971. From 1972 to 1976 he was a Researcher Assistant; from 1976 to 1980 he was Associate Professor in Petrography; from 1980-1996 he was Associate Professor in Mineralogy; from 1996 to 2003 he was Associate Professor in Volcanology; from 2007 to 2012 he was Full Professor in Volcanology at the same University of Napoli Federico II. In 1981 he was at University of Cambridge, U.K, Department of Earth Science; from 1989 to 1990 he served as a Lecturer of Volcanology, Petrography, Geochemistry for geosciences at University of Addis Ababa (Ethiopia). He has published more than 80 papers on Campi Flegrei and Somma-Vesuvius active volcanoes (most of them in top internationally refereed journals); as well as 10 educational publications and monographs.