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Which of the following choices contains two ways in which carbon enters the atmosphere? A. Erosion and transpiration B. Volcanic Activity and Photosynthesis C. Human Activity and Nitrogen-Fixing Bacteria
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Which of the following choices contains two ways in which carbon enters the atmosphere?

A. Erosion and transpiration
B. Volcanic Activity and Photosynthesis
C. Human Activity and Nitrogen-Fixing Bacteria
D. Emissions from Factories and Respiration

User Dr Y Wit
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7 votes

Answer:

d. or c. is what I think I limited your options

User Svyatoslav Danyliv
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