New Delhi, Dense fog enveloped Delhi, reducing visibility to zero and disrupting flight and train operations on Friday as the weather department predicted rain over the weekend. Over 100 flights were ...

With wildfires currently raging across Los Angeles and strong winds carrying smoke and pollutants, much of the area is ...

Longterm health damage becomes a concern as the air quality index reached hazardous levels for some neighborhoods ...

Certain masks are effective in protecting against wildfire smoke — but only if they are fitted and worn properly.