Which process is most responsible for the increase in early Earths atmospheric oxygen levels

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asked Oct 9, 2018 82.1k views

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Sabumnim · Answer 1 · 2018-10-16T01:38:15+0000

The Great Oxygenation Event- referred to as such because it increased Earth's atmospheric oxygen levels. This was caused by the evolution of photosynthesizing organisms releasing oxygen.

Which process is most responsible for the increase in early Earths atmospheric oxygen levels

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