
As Vietnam’s big cities have been engulfed in toxic air for months, some Vietnamese people have turned to a novel solution – buying hits of purified oxygen to escape the pollution.
According to data by AirVisual, an independent online air quality index monitor, Hanoi and Ho Chi Minh City, Vietnam’s two largest cities, are frequently listed among the world’s worst 20 metropolises in terms of air quality. Tiếp tục đọc “Vietnamese people resort to portable oxygen cylinders for respite from smog”