The Bush administration is a fan of it, apparently. The New York Times has more:

“In a striking shift in the way the Bush administration has portrayed the science of climate change, a new report to Congress focuses on federal research indicating that emissions of carbon dioxide and other heat-trapping gases are the only likely explanation for global warming over the last three decades.”

The “only” likely explanation?

Election year pandering, I suppose, and contemptible as it is counter-productive, sort of like an environmental McCain-Feingold-Bush. Pathetic.