Oxygen did not accumulate in the early atmosphere until it reacted with reduced materials, especially________ , in the oceans. These substances then reacted spontaneously with oxygen to produce________.

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The Answer of Oxygen did not accumulate in the early atmosphere until it reacted with reduced materials, especially________ , in the oceans. These substances then reacted spontaneously with oxygen to produce________.

Oxygen Did Not Accumulate in the Early Atmosphere Until It