Why would the addition of oxygen to the atmosphere be considered a catastrophe? What's the relation between this and first bacteria on earth?

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Why would the addition of oxygen to the atmosphere be considered a catastrophe? What's the relation between this and first bacteria on earth?

Science & Mathematics by Anonymous 2018-06-06 14:03:44

Social Science

Why would the addition of oxygen to the atmosphere be considered a catastrophe? What's the relation between this and first bacteria on earth?

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