Fig. 1: O3 levels and associated mortality during the warm season (May–September), 2015–2017.
From: Geographic sources of ozone air pollution and mortality burden in Europe
a, Average daily mean 8-h maximum O3 (µg m−3). b, Mortality (annual deaths per 1 million population) attributable to O3. a,b, Histograms depict both the color legend and the number of regions for each value.
