title: Air pollution: a major public health problem.
mesh_terms: D000397:Air Pollution / Q000032:analysis; D001249:Asthma / Q000453:epidemiology; D001991:Bronchitis / Q000453:epidemiology; D002249:Carbon Monoxide Poisoning; D002263:Carboxyhemoglobin / Q000032:analysis; D002648:Child; D002980:Climate; D004781:Environmental Exposure; D005374:Filtration; D006262:Health; D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology; D008670:Metals / Q000009:adverse effects; D009026:Mortality; D009589:Nitrogen Oxides / Q000009:adverse effects; D010108:Oxyhemoglobins / Q000032:analysis; D010316:Particle Size; D010507:Periodicity; D011634:Public Health; D011656:Pulmonary Emphysema / Q000453:epidemiology; D012140:Respiratory Tract Diseases / Q000453:epidemiology; D012621:Seasons; D012905:Smog; D012907:Smoking; D013274:Stomach Neoplasms / Q000453:epidemiology; D013458:Sulfur Dioxide / Q000009:adverse effects; D014116:Toxicology; D006113:United Kingdom; D014481:United States
chemical_list: D008670:Metals; D009589:Nitrogen Oxides; D010108:Oxyhemoglobins; D012905:Smog; D013458:Sulfur Dioxide; D002263:Carboxyhemoglobin