Specialized air quality instruments captured a spike in lead, chlorine, and bromine pollution during the L.A. wildfires.

Indicators like the Air Quality Index (AQI), commonly used to track air pollution levels, provide a rough sense of the ...

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

The Vietnamese capital of Hanoi was the world's most polluted city for much of January 2025, with the hazardous smog posing ...

Researchers at Brown University discovered that fine-particle pollution can significantly impact your marathon finish time ...

Think back to the red AQI forecast on your phone. What information was it trying to convey? The Air Quality Index (AQI) is a ...

The Air Quality Index measured 156 near Forks, Washington, and received a rating of "unhealthy," meaning some members of the ...

The AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) ...

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