Air pollution engulfs Hanoi city
Winter air warning on heavily polluted days
Localities asked to act urgently to tackle air pollution
Mobile app helps users update information about air quality
Nearly 450 schools in Thailand’s capital city shut due to air pollution
Hanoi schools to shut on bad air days
Hanoi’s declining air quality blamed on change of seasons
Thai PM requests air pollution be alleviated in seven days
Air pollution worries people in northern Thailand
Hanoi city’s air quality remains poor
Air quality improves across affected areas in Bangkok
Thailand: Bangkok on alert for air pollution
