Which atmospheric hazard may arise from increased oxygen levels?

Increased oxygen levels can lead to flammable or explosive atmospheres because oxygen is a key component required for combustion. When the concentration of oxygen in the atmosphere rises above its normal level (approximately 21% in the air we breathe), it significantly enhances the flammability of materials that may otherwise be relatively safe in normal conditions. This phenomenon can cause materials to ignite more easily and burn more intensely, posing a substantial risk of fire and explosion.

For instance, in environments where oxygen enrichment occurs—such as in certain industrial processes, or in cases of leaking oxygen tanks—ordinary flammable materials can ignite at lower temperatures or with less spark than they would in a normoxic environment. Therefore, awareness of the hazards associated with increased oxygen levels is essential for maintaining safety in work environments where such conditions may be present.