A recent report by the American Lung Association gives the greater Phoenix metro area mixed results on the quality of its air. The report based on data from 2109 through 2021 shows some metrics on air pollution in the region improving slightly, but overall the urban area still has some of the highest particulate and ozone pollution in the U.S. The Phoenix-Mesa vicinity had the fifth worst ozone pollution of any metro area. Quoted in the article, Matthew Fraser, an urban air quality expert and professor in the School of Sustainable Engineering and the Built Environment, part of the Fulton Schools, says the report provides no reason to be satisfied with current efforts to mitigate local air pollution.