Dr. David Galán is a scientific researcher (from 2004 up to nowadays) in the Department of Atmospheric Pollution (National Reference Laboratory for Air Quality in Spain) of the National Center for Environmental Health (Health Institute Carlos III). He is the head of functional unit in that Department and holds a PhD in Inorganic and Bioinorganic Chemistry by Complutense University of Madrid (Mention of European Doctorate). Similarly, Dr. Galán is an expert in instrumental techniques by Faculty of Chemical Sciences (Complutense University of Madrid) and holds a Master in Computer Science and Management as well as 31 specific courses. Dr. Galán has published more than 190 scientifictechnical reports as well as more than 36 oral communications in international congresses, including air quality issues. Dr. Galán has been served as a member of Directive Board of a Scientific Society such Spanish Society for Environment Health (2013-2017), member of the European Committee for Standardization (CEN/TC 264 “Air Quality”), member of Workgroups for developing European Normative Projects, as WG 34 “Determination of anions and cations in ambient air”, member of Scientific and Management Committees in Scientific Congresses, Editorial Board Member for Annals of Civil and Environment Engineering, Journal of Epidemiology and Global Health Research and Environmental Science: Research and Reviews, technical assistant for the Expert Committee for air quality assessment during a large fire at a used tire landfill, as well as a member of board of national competitive exams in the field of research for Research Public Organizations on numerous occasions (2006-2019). Nowadays, he is TechnicalScientific Committee member for RELAB (Network of Biological Alert Laboratories). In teaching, Dr. Galán has been part of the Teachers Board in courses and masters of environmental techniques and air pollution. In researching, Dr. Galán has been a main research of 3 research projects and was included in the research team of numerous international research projects and contracts with the Public Administration. Dr. Galán has been responsible for the validation process and subsequent accreditation by ENAC (National Accreditation Entity for Spain) of more than 50 parameters. Research Interest: - Air quality 1. Characterization of atmospheric pollutants in outdoor and indoor air 2. Sampling process for atmospheric pollutants (particles and gaseous) 3. Distribution of air pollutants and identification of hot-spot in studied surfaces. 4. Selection of sampling points to establish a reliable air quality monitoring network by passive methodology 5. Modelling of air pollutants 6. Sources apportionment 7. Current Legislative Challenges 8. Validation of analytical techniques for air quality Exposure estimate to air pollutants and impact on human health