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

Delhi on Wednesday recorded a minimum temperature of 7.6 degrees Celsius at 5:30 am, according to the India Meteorological ...

The EPA created six color-coded categories from green (good, when the AQI is under 50) to maroon (hazardous, when the metric ...

Delhi on Wednesday recorded a minimum temperature of 7.6 degrees Celsius at 5:30 am, according to the India Meteorological ...