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Winter is respiratory illness season in Arizona. Large numbers of patients are showing up at our local emergency departments coughing, wheezing and gasping for air. Viruses, bacteria and fungi cause ...

SALT LAKE CITY — That familiar and unwelcome layer of smog is back. As air quality plummets in Utah, experts are offering solutions to reduce pollutants. Wednesday marked day six of this inversion ...

Note to readers • This story is made possible through a partnership between The Salt Lake Tribune and Grist, a nonprofit environmental media organization. Utah residents are familiar with the thick ...

BOISE -- The inversion is causing some air quality issues in the Treasure Valley and it's not expected to move out for a few days. Air quality experts are recommending that certain groups limit their ...

Winter weather in Reno is bringing more than just cold temperatures; it is also trapping pollution over the valley through a phenomenon known as a winter inversion. Experts say Reno's unique geography ...