[Spyckie]

From what I understand, these scientists are merely saying that there is not enough evidence yet to instantiate the hypothesis of man-made global warming into fact. And by evidence, these guys are looking accurately descriptions of several known phenomena that affect our climate that are not yet well understood.

The scientists bring up 2 good points for science's sake - first is that scientific models need to be 'tuned' because its impossible to deal with all of the complexities of nature - this makes them susceptible to selective tuning to make them support the hypothesis. They also imply that this hypothesis is unscoped, meaning that solar, aerosel, or other factors haven't been adequately taken into account. If you want to prove the link between carbon and temperature change, prove that that observed effect isn't caused by anything else.

I also think this title is completely link-bait, because they aren't suggesting that Global warming isn't man-made. They are merely saying that the scientific evidence is not conclusive, and won't hold up in a scientific forum if there was no humanitarian agenda attached. I think its healthy for the scientific community, frankly.