After nearly 10 days of an inversion along the Wasatch Front, the smog is finally clearing out. National Weather Service meteorologist Hayden Manhan said the improved air quality is due to Sunday ...

They combined with an unusual temperature inversion: cold air became trapped ... Its documentation of the pivotal smog event has attracted researchers from around the globe as well as regular ...

Because the Sacramento Valley is shaped like a bowl, smog presents a critical problem in the summer, when an inversion layer traps pollutants close to the ground, causing unhealthy air quality levels.

Lahore, Pakistan - Tens of millions of Pakistanis spent at least four months breathing toxic air pollution 20 times above safe levels, in the worst winter smog season for several years ...