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Card 6
Front
Today the Earths atmospherehas much less than 1% carbon dioxide and has more than 21% oxygen this means that?
Back
Card 7
Front
How does oxygen get added to our atmosphere?
Back
Card 8
Front
How was carbon dioxide removed from the Earths early atmosphere?
Back
Card 9
Front
What can add carbon dioxide to the atmosphere?
Back
See full card set