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Methane,Carbon Dioxide,Ammonia Nitrogen! 4.5 BIllion Years Ago
We were formed by the rain filling up the hollows in the solid crust!
CO2 dissolved in oceans, then concentrated into the shells of sea creatures as calcium carbonate! 3.8 Billion Years Ago!
Nitrogen levels rose because there was more nitrogen in the soil! 500 Million Years Ago!
One theory is that all us photosynthetic organisms were created on the ocean floor and all we needed was was a simple cell to evolve!
O2 levels rose because the algae (small plants) were taking in the carbon dioxide and making it into oxygen! 200,000 years ago!
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