Have you seen Al Gore's film "An Inconvinent Truth"?
In one part, he says something similar. Scientists have graphed the sea water temperature over millions of years through using ice in the Arctic, and there is a real pattern to there being a cycle of global warming. But when you get to about the 18th century, it really rockets up. If i remember right, he summed up in that part that Global Warming is meant to happen, but not to this degree.
Its a good film if your interested in that kind of thing. Its quite long and drawn out though. Its basically a conference he did, which they filmed. Its not a story, just a lecture. But still, good watch all the same, even if it is biased.





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