Air pollution hits harmful levels Wednesday, Pima County warns https://www.tucsonsentinel.com/local/report/051723_ozone_warning/air-pollution-hits-harmful-levels-wednesday-pima-county-warns/
Air pollution in the Tucson metro area hit harmful levels on Wednesday, with high concentrations of ground-level ozone, prompting an advisory from Pima County that residents should avoid intense physical outdoor activity.
#Tucson #Arizona