air quality criteria

On Friday, a thick haze kept enveloping Delhi as the air quality deteriorated a day after it had tipped into the severe category

The wildfires raging in Canada have blanketed the New York in thick layers of smoke, posing a significant threat to the health

A dust storm swept across Delhi-NCR on Tuesday morning, resulting in reduced visibility and a significant drop in air quality.

Poor air quality; The increase in heat waves, and the greater number of forest fires they cause, will increasingly worsen air quality

WHO toughens its air quality criteria; The air pollution that causes seven million deaths annually worldwide, is even more harmful than