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Argument: Argument thesis  Global Warming is of human origin
Node type: Node refutes parent assertion  This node refutes its parent
Parent Node: Node refutes parent assertion  Not according to temperature graphs.
Node Text: They are not supernatural

There have been many instances of sharp cooling/warming periods in history, and prehistory(as indicated by ice cores, geological samples, and the fossil record.)

However, the earth is currently undergoing a global cooling trend, which climatologists expect to continue for at least the next 20 years, again suggesting natural trends.
Node Created: J-Luck — 2008-11-09 23:11:53

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