Annual American Lung Association report shows continued progress in air quality, but more to be done
Green Car Congress
APRIL 29, 2011
as the cleanest cities—the only two cities in the nation that were among the cleanest for year-round particle pollution and also had no days when ozone and daily particle pollution levels reached unhealthy ranges. Fresno-Madera, Calif. Fresno-Madera, Calif. Phoenix-Mesa-Glendale, Ariz. Fresno-Madera, Calif.
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