Originally posted by Leonhard
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in ice cores recovered from Greenland glaciers. Each successively deeper ice layer represents a snapshot of Earth's climate history from the past
There are cycle that explain the Ice Age. There's a big one about the wobble of the Earth's rotation which is more than ten thousand year long called the Milankovich Cycle. It explains a very slow, periodic temperature variation. It can't however explain the sudden rise in temperature since the seventies. CO2 driving a greenhouse effect can however.
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