Monitoring Air Pollution in Greek Urban Areas During the Lockdowns, as a Response Measure of SARS-CoV-2 (COVID-19).

Unlabelled: On March 11, 2020, the World Health Organization declared COVID-19 (SARS-CoV-2) a pandemic. Countries all over the world imposed restriction measures, in an attempt to limit the expansion of the pandemic. Provided that human activities in large urban areas affect air quality, we studied the concentrations of gaseous pollutants ΝΟ, ΝΟ, O, CH, and particulate matter PM in the air, through gas pollution measuring stations in the center of Athens (Greek capital), the center of Piraeus (Greece's largest port), Athens International Airport (most international and domestic flights within Greece).