What is the role of oxygen present in the air ?

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The presence of oxygen in the atmosphere is also harmful. For example, corrosion of metals is caused by oxygen. Slow destruction of metals particularly of iron causes a huge financial loss to the society. Oxygen also causes slow degradation of oils and fats.

The presence of oxygen in the air (atmosphere) is very essential for the following:

  1. The life processes such as respiration, in all living organisms.
  2. Combustion of fuels.Otherwise, fire would not have been possible.

However, the presence of oxygen in the atmosphere is also harmful. For example, corrosion of metals is caused by oxygen. Slow destruction of metals particularly of iron causes a huge financial loss to the society. Oxygen also causes slow degradation of oils and fats.

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