There's an interesting article over at livescience.com about many of the myths being circulated about global warming. As per usual many of these myths are being caused by folks who are simply spreading speculation to further an ideological goal without any hard science backing it up. In this particular instance, a rumour has been spreading mostly on the internet that the American Physical Society has reversed it's position on Global Warming. This simply isn't true, and in response they have reaffirmed that they still believe the consensus view on their website.

From the article, which can be found here: http://www.livescience.com/environment/080718-aps-gw.html

"Stories of the supposed policy reversal began popping up after an article by Christopher Monckton, a politician and a former policy advisor in Margaret Thatcher's administration, submitted an article in an online newsletter of the APS Forum on Physics and Society. The article claimed that the Intergovernmental Panel on Climate Change (IPCC) had overestimated the Earth's climate sensitivity to carbon dioxide (or how much the global average temperature will change given a certain amount of carbon dioxide entering the atmosphere).

In the article, Monckton, the 3rd Viscount Monckton of Brenchley, also claims that changes in solar activity are behind the warming trend of the past few decades, an idea that has been refuted by several climate scientists.

A note in red lettering above the article states that it has not been peer-reviewed and that "its conclusions are in disagreement with the overwhelming opinion of the world scientific community. The Council of the American Physical Society disagrees with this article's conclusions."

On their homepage, the APS has now placed a statement that reaffirms its 2007 position statement on global warming, which also states, "The evidence is incontrovertible: Global warming is occurring." It adds that mitigation efforts must be taken immediately."