Learn what the air quality index (AQI) means, how it impacts your health, and how to stay safe when pollution is high.

The Air Quality Index does not take into account many gas or particle contaminants ... "They emit more toxic material per ...

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

Toxic smoke and dangerous particulate pollution are spreading far beyond the flames, leaving air quality at unhealthy levels ...

Just for perspective, we've now burned down [an area] like the entire city of San Francisco.” The experts said that even ...