Unhealthy air quality has descended on parts of the Bay Area thanks to a combination of cold weather, dense fog and smoke.

Delhi's air quality improves to 'moderate' category with Air Quality Index at 211, as per CPCB data on Wednesday.

On Tuesday at 4:09 p.m. an updated air quality alert was issued valid until Thursday at midnight. The alert is for Catalina ...

An updated air quality alert was issued on Tuesday at 3:59 p.m. in effect until Thursday at midnight. The alert is for San ...

The burn bans are issued when air quality becomes a concern and to prevent it from worsening. Stage 2 burns mean that all ...

"It's looking like, at least for the rest of the week into Friday, we're going to have either a stage one or a stage two burn ...

Tech entrepreneur Bryan Johnson, on his India tour, highlights Mumbai's air pollution by comparing it with the filtered air ...

Dallas County is among 10 counties that don’t meet new federal air quality guidelines. What happens next is anyone’s guess.

Ask people in the Bronx about the MTA's congestion pricing plan and it's not traffic and tie-ups that worry the moms and dads ...

Air quality in Thailand deteriorates; 20 provinces report unsafe levels. Residents advised to limit outdoor activities, wear ...

Former Utahns Heidi Belka and her son Freddy, who suffers from asthma, moved to Hawaii over the summer. And it’s all because ...

Delhi was listed as India's most polluted city Thursday as a weeks-long air quality crisis gripping northern India has shown ...