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Posted by Roma Gonmei 5 years, 1 month ago
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Yogita Ingle 5 years, 1 month ago
Oxygen is the second most plentiful gas in the air. Oxygen plays an important role for human beings, animals and plants in the following ways. Most of the living beings need oxygen for respiration. Green plants produce oxygen during photosynthesis.
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Aakirti Dwivedi 5 years ago
1Thank You