Why does Austin sometimes smell weird when it's cold outside?

AUSTIN (KXAN) — If you noticed a strange smell in the Austin air recently, you're not imagining things! You also don't need to call the fire department or police.
The smelly phenomenon is actually normal for the area this time of year. It comes from the Luling oil field, which is about 9 miles south of Lockhart.Plunging temperatures, strong winds today behind Arctic cold frontKXAN Meteorologist David Yeomans explained that light south winds underneath a temperature inversion seem to carry