Which of the following is not a natural cause of climatic change?
A. Solar activity
B. Earth's tilt
C. Volcanic activity
D. Human activity
Human activity is not a natural cause of climatic change.
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Asked 12/30/2015 4:14:08 PM
Updated 12/31/2015 8:00:54 AM
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selymi [12/31/2015 8:00:54 AM]
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