What would happen to a person in a pure oxygen environment?
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Unfortunately, he will be poisoned.
An excess of oxygen hinders the removal of carbon dioxide from tissues, damages cell membranes, and causes other adverse changes. Symptoms of poisoning may include trembling lips, dizziness, blindness, convulsions, and loss of consciousness. In addition, an oxygen-rich environment is extremely flammable.
The Apollo program spacecraft initially had an atmosphere of pure oxygen at reduced pressure. This reduced the spacecraft’s mass. However, during tests in 1967, a fire broke out on board due to an accidental spark—killing three astronauts. The idea of an oxygen atmosphere was abandoned.
