Chemical Analysis of Surface-Level Ozone Exceedances during the 2015 Pan American Games by Craig A. Stroud, Shuzhan Ren, Junhua Zhang, Michael D. Moran, Ayodeji Akingunola, Paul A. Makar, Rodrigo Munoz-Alpizar, Sylvie Leroyer, Stéphane Bélair, David Sills, Jeffrey R. Brook

“…Surface-level ozone (O₃) continues to be a significant health risk in the Greater Toronto Hamilton Area (GTHA) of Canada even though precursor emissions in the area have decreased significantly over the past two decades. In July 2015, Environment and Climate Change Canada (ECCC) led an intensive field study coincident with Toronto hosting the 2015 Pan American Games. …”
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