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

Millions of mobile phone users got an emergency alert as people in Scotland and Northern Ireland warned to stay indoors and schools close ...

Many phone apps offer general but nonspecific information about airborne particles. To help increase public safety amidst the ...

Angelenos are being encouraged to keep their air purifiers on and to wear a mask when outside in the wake of the recent fires ...