There have been developments in recent weeks as new studies on the warming in Antarctica and the behavior of clouds in relation to greenhouse gases have been called into question.
First, in Antarctica, they've found that the warming is not quite as significant as first suspected. This is important for two reasons: first, because there are obvious implications about the rate of global warming not being as severe as once suspected. Second, it calls attention to the weaknesses inherent in the scientific method when dealing with hot-button issues (read more about that in Jonah Lehrer's excellent piece from the New Yorker).
Then, to the clouds. In much the same fashion, it would seem that some of the research pointing to increased cloud activity due to greenhouse gases has been overzealous (a video used as part of their research can be seen above). Once again, this is not to say global warming needs to be called into question, only that the research needs to be more closely reviewed if we're to have an accurate picture.
Submitted by Andrew Fatato