Although it is true that pollution is a factor, doctors all stress that asthma is a multiple causation illness. Air pollution can only be considered an indirect cause. One cannot overlook the changes in living style brought about by modernization.
雖然如此，醫師們都強調氣喘是「多因性」疾病，空氣污染只能算是間接的發病肇因，現代化帶來的生活型態改變更不能讓人忽視。