title: A study of the statistical distribution of chemical pollutants in air.
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002031:Bulgaria; D003486:Cyanides / Q000032:analysis; D004391:Dust / Q000032:analysis; D005557:Formaldehyde / Q000032:analysis; D006862:Hydrogen Sulfide / Q000032:analysis; D007854:Lead / Q000032:analysis; D009569:Nitric Oxide / Q000032:analysis; D010636:Phenols / Q000032:analysis; D013458:Sulfur Dioxide / Q000032:analysis
chemical_list: D000393:Air Pollutants; D003486:Cyanides; D004391:Dust; D010636:Phenols; D013458:Sulfur Dioxide; D005557:Formaldehyde; D007854:Lead; D009569:Nitric Oxide; D006862:Hydrogen Sulfide