Rising temperatures, the return of heavy traffic and inescapable seasonal allergies have seen urban air quality take a significant dive this summer. Add in dust mites, pet dander, pollen and other ...

A literal 'smog' of particulates was created in all cases ... than what studies typically report for outdoor air quality in ...

Dhaka, a city of narrow alleyways and congested streets, remains one of the world's most polluted, leaving its residents trapped in urban smog and struggling to recall the last time they breathed ...

As the year comes to an end, the age-old problem of smog in Delhi and the surrounding areas makes headlines yet again.