With air purifiers fighting a losing battle against the ever-deteriorating environment, additional self-help measures seem to be in order.
對付超過經濟成長率三倍的空氣汙染實在不太容易，儘管空氣淨化器大行其道，但人們總不能足不出戶，醫院裡仍擠滿了喉腫、高燒、呼吸道感染的求醫者。