Toxicology: the respiratory tract.
D000397:Air Pollution; D001424:Bacterial Infections / Q000209:etiology; D002249:Carbon Monoxide Poisoning; D004781:Environmental Exposure; D004787:Environmental Pollution; D006801:Humans; D008168:Lung / Q000187:drug effects / Q000473:pathology / Q000502:physiology; D009585:Nitrogen Dioxide / Q000633:toxicity; D010126:Ozone / Q000494:pharmacology; D011656:Pulmonary Emphysema / Q000139:chemically induced; D012137:Respiratory System / Q000187:drug effects*; D012140:Respiratory Tract Diseases / Q000453:epidemiology; D013458:Sulfur Dioxide / Q000494:pharmacology; D014116:Toxicology
D013458:Sulfur Dioxide; D010126:Ozone; D009585:Nitrogen Dioxide