BANGKOK, Thailand — Air ... restricted heavy vehicles in the city. Air pollution hits the Southeast Asian nation seasonally, as colder, stagnant winter air combines with smoke from crop stubble ...

Bangkok officials ... in the city. Air pollution hits the Southeast Asian nation seasonally, as colder, stagnant winter air combines with smoke from crop stubble burning and car fumes.

Air pollution in the Thai capital forced more than 350 schools to close on Friday, city authorities said, the highest number in five years. Bangkok officials also announced free public transport ...