[{"from": "human", "value": "Provide a brief overview of this molecule. [O][=O]"}, {"from": "gpt", "value": "The molecule is an element displayed by the symbol O, and atomic number 8.  It is an essential element for human survival. Decreased oxygen levels may be treated with medical oxygen therapy. Treatment with oxygen serves to increase blood oxygen levels and also exerts a secondary effect of decreasing blood flow resistance in the diseased lung, leading to decreased cardiovascular workload in an attempt to oxygenate the lungs. Oxygen therapy is used to treat emphysema, pneumonia, some heart disorders (congestive heart failure), some disorders that cause increased pulmonary artery pressure, and any disease that impairs the body's ability to take up and use gaseous oxygen. Higher level of oxygen than ambient air (hyperoxia) can be introduced under normobaric or hyperbaric conditions."}]