Depending on the different pollutants in the air, like pollen or wildfire smoke, some days can be easier to breathe than ...

The Air Quality Index in Delhi improved, leading to the lifting of Stage-I restrictions of the Graded Response Action Plan.

Delhi's air quality has seen substantial improvement, with the Air Quality Index (AQI) dropping to 85the lowest recorded ...

The air quality index is a scale used to measure how healthy the air is in a certain region. It has six categories, ranging from "good" to "hazardous." Air quality will be scored on a scale from ...

Knoxville's mountainous skyline is covered in a hazy layer of smoke Wednesday, March 12. Air quality in the region is considered unhealthy for "sensitive groups," according to the Knox County ...