The most frequent alternative explanation people offer for the current warming goes like this:
'The planet has warmed before. There were no humans or SUVs around then. Therefore, the current warming is just a natural cycle'.
Ignoring the logical fallacies with this argument, let's just look at the data. Here is a graph showing the natural (Milankovitch) cycles of the Earth:
http://en.wikipedia.org/wiki/Image:Milankovitch_Variations.png
Notice that these cycles occur over thousands of years, not rapid changes over a few decades or centuries. On top of that:
"An often-cited 1980 study by Imbrie and Imbrie determined that 'Ignoring anthropogenic and other possible sources of variation acting at frequencies higher than one cycle per 19,000 years, this model predicts that the long-term cooling trend which began some 6,000 years ago will continue for the next 23,000 years.'"
Considering this evidence, do you agree that the current warming is not due to natural cycles?
2007-10-12
09:50:25
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39 answers
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asked by
Dana1981
7
in
Politics