Dense toxic smog has blanketed New Delhi, pushing air pollution levels to their worst levels in weeks and disrupting travel.

On Sunday, Delhi's air quality was "severe" with official index readings over 450 across several monitoring stations.

But the local authority's latest Air Quality Annual Status Report has found that only one of those seven areas has recorded ...

The Orange County and Santa Ana Mountains area is the focus of an air quality alert reported at 11:54 a.m. on Friday by the ...

Los Angeles County is the focus of an air quality alert reported at 11:33 a.m. on Sunday by the National Weather Service. The ...

Los Angeles County is included in an air quality alert reported by the National Weather Service on Saturday at 12:02 p.m. The ...

On Sunday at 11:33 a.m. the NWS Los Angeles/Oxnard CA reported an air quality alert in effect until Tuesday at midnight. The ...

At 12:45 p.m. on Friday, the NWS Los Angeles/Oxnard CA reported an air quality alert in effect until Sunday at midnight. The ...

Since the days of big steel, Pittsburgh's air quality has ranked among the worst in the country. However, a new report ...

The fire produced smoky conditions in Freehold Borough on Thursday, but conditions appeared to be improving by morning.

Many organizations are taking actions to shrink their carbon footprint, such as purchasing electricity from renewable sources ...

Healthcare experts told people to avoid outdoor activities as hospitals reported an influx of patients with breathing ...