What happened in the Second Phase of our Atmosphere?

5. Most of the CO², from the Eruptions, was Dissolved in the Oceans 6. Nitrogen then finally joined in; Ammonia Reacted with Oxygen to give off Nitrogen, and also Denitrifying Bacteria also released Nitrogen 7. Nitrogen then began Increasing in its Percentage as its very Unreactive, so it can't really be Broken Down. 8. Then, Oxygen joined in as Green Plants Evolved over Earth, meaning Photosynthesis 9. So the Oxygen Levels began to Increase, and the Carbon Dioxide Levels fell as it became Fossil Fuels and Sedimentary Rocks