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Question
Which one of the following is the most important constituent of the atmosphere for human beings?
Options
Water vapour
Nitrogen
Dust particle
Oxygen
MCQ
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Solution
Oxygen
Explanation:
Oxygen is the most important constituent of the atmosphere for human beings because it is essential for respiration, the process by which our bodies produce energy. Without oxygen, human life cannot survive, making it vital despite nitrogen being more abundant.
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Introduction of Water in the Atmosphere
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