U of A to study biodiesel-fueled mining

Researchers at the University of Arizona have won a $1.4 million grant from the National Institute for Occupational Safety and Health.

Valley air particles and ozone

An expert explains why it gets hazy and which air conditions Phoenix residents need to worry about.

High ozone levels may continue through weekend

Friday will be the eighth day this year the Valley’s been under a high pollution warning. Continued high temperatures could lead to more ozone advisories through the weekend. 

EPA to clean up haze-causing pollutants

  The Environmental Protection Agency has issued its final rule aimed at cleaning up the largest single source of haze-causing pollutants in the country.

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