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01-07-2013, 08:13 AM
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Originally Posted by mrwarden View Post
Natural trends and cycles reversing themselves and the role they may or may not be playing in data which reverse themselves or change unexpectedly from time to time.
Possibly. No evidence supports that claim, however.

Furthermore, extensive evidence supports the claim that CO2 and other greenhouse gases are the cause, most notably the simple chemistry that shows that the effect we're seeing can be caused by said chemicals and the correlation we see with anomalous temperatures and CO2 levels.

The fact is this is how science works. There's a way the theory can be shown as false, as always, but that must happen before they are actually said to be false, since the theory has enough evidence to meet the burden of proof. As of right now, the evidence says the Earth is warming, and it is correlated almost perfectly with rising CO2 level from the last 100 years. Of course, correlation doesn't always equal causation, but when the correlation is as dramatic as it is, and the basic science (that being the fact that, in controlled tests, more CO2 results in higher temperatures) behind it is undeniable, then you can't really come to any other conclusion unless there's substantial evidence to support another one beyond "well, it could be natural".

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