title: Air quality criteria and guides for urban air pollutants. Report of a WHO Expert Committee.
mesh_terms: D000397:Air Pollution; D002248:Carbon Monoxide; D004782:Environmental Health; D009585:Nitrogen Dioxide; D010084:Oxidation-Reduction; D013458:Sulfur Dioxide; D014944:World Health Organization
chemical_list: D013458:Sulfur Dioxide; D002248:Carbon Monoxide; D009585:Nitrogen Dioxide