Air quality advisory issued because of smoke and ozone

LAS VEGAS -- An air quality advisory has been issued because of the smoke and ground-level ozone in Clark County.

Wildfires burning near Mexicali and a mulch pit fire northwest of the Las Vegas valley are filling southern Nevada skies with smoke, which can aggravate respiratory diseases.

Ozone is a gas that occurs naturally in the upper atmosphere and protects the earth from the sun's rays. When the gas is at ground level, it becomes a key ingredient for urban smog during the hottest months of the year.

The advisory is in effect for Wednesday. People with respiratory diseases should limit outdoor activity.

Unhealthy levels of air pollution have not been detected so far, but officials with the Clark County Department of Air Quality are monitoring conditions. They will post an alert, if levels become unhealthy.


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