The residents of New York City have been found to be the most fatigued in America, with Denver following up, perhaps ...

Poor air quality has been detected in multiple states surrounding California. The state has been hit with multiple deadly ...

Calculating air pollution from wildfires and other events has become more complicated. That doesn’t mean it’s necessarily ...

A series of life-threatening fires are destroying homes as they race across Los Angeles County and surrounding areas. CNN is tracking the fires in maps and charts ...