https://www.youthkiawaaz.com/2023/11/drastic-drop-in-oxygen-levels-leads-scientists-to-think-about-doomsday/
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11/21/23 at 11:18am
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Youthkiawaaz.com
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shakeel ahmad
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Oxygen constitutes about 21 per cent of the Earth’s atmosphere and plays a significant role in the survival of countless species.
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