[Epistemologist]

Quote by: Chancellor To quote the made-for-television movie Category 6, "Global warming is an unproven theory." While certainly not an authoritative source... Letters of Marque: Global Warming: Theory and Fact

That's good, since they mentioned changes of means and correlations that exist. They also explain that these claimed causations aren't sufficiently proven. Actually, many studies claim causations, although I'm not sure how many of them fail to consider confounding variables.