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Updated Apr 11, 2013 - 6:59 am

With weather warming, Arizona officials urge air-quality vigilance

PHOENIX — Arizona officials said residents must be vigilant about air
quality as warmer temperatures start to usher in dangerous ozone pollution.

Maricopa County Air Quality Director Bill Wiley issued a warning to local
residents this month marking the beginning of the area’s ozone season.

Wiley said ozone pollution is more widespread in the summertime because
pollutants and nitrogen oxides react more easily with heat and sunlight.

Last year, there were 29 days when one or more air quality monitors exceeded
the federal ozone health standard in Maricopa County.

The Arizona Department of Environmental Quality also issued eight pollution
advisories and 33 health watches for ozone last year.

Ozone pollution is odorless and colorless. It poses a direct threat to people
with respiratory problems.

Driving less and conserving electricity helps reduce pollution.

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