The ambient air, the good of it and the bad of it: the development of therapeutic gases and air pollution.
D000397:Air Pollution; D002248:Carbon Monoxide; D005740:Gases; D006371:Helium / Q000627:therapeutic use; D006801:Humans; D006931:Hyperbaric Oxygenation; D008173:Lung Diseases, Obstructive / Q000188:drug therapy; D010102:Oxygen Inhalation Therapy; D013458:Sulfur Dioxide; D014481:United States
D005740:Gases; D013458:Sulfur Dioxide; D006371:Helium; D002248:Carbon Monoxide