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Earth's Carbon Cycle by flipzip on 10-01-2013
Date: August 26, 2177... President Eden is curious about the nutrient cycles of Earth...
Computer, I would like to study different cycles of nutrients. What do you suggest?
I suggest the carbon cycle.
Computer, show me the carbon cycle, step by step
Loading... Carbon is placed into the atmosphere in the form of carbon dioxide by the respiration of animals, human activity, evaporation, and volcanic activity
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