title: Bronchitis, emphysema, and air.
mesh_terms: D000397:Air Pollution; D001991:Bronchitis / Q000000981:diagnostic imaging* / Q000209:etiology; D002648:Child; D002908:Chronic Disease; D006801:Humans; D011656:Pulmonary Emphysema / Q000000981:diagnostic imaging* / Q000209:etiology; D011859:Radiography; D012907:Smoking