SALT LAKE CITY -- Gov. Gary Herbert is declaring May to be Clean Air Month for the state of Utah.
Herbert will appear at a clean air event Thursday afternoon at a home near the state Capitol to demonstrate steps homeowners can take to help improve Utah's air quality and reduce the impact of atmospheric inversions.
Officials have issued alerts on more than 20 days this year when inversions have trapped cold air and pollutants in northern Utah's bowl-shaped mountain valleys, at times giving the area the nation's worst air.
More than 100 Utah doctors in January said the situation was a public-health emergency and called on authorities to lower highway speed limits, limit industrial activity and make mass transit free for the rest of the winter.