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On February 2, an AEI research project on climate change policy that we have been organizing was the target of a journalistic hit piece in Britain's largest left-wing newspaper, the Guardian. The article's allegation--that we tried to bribe scientists to criticize the work of the United Nations Intergovernmental Panel on Climate Change (IPCC)--is easy to refute. More troubling is the growing worldwide effort to silence anyone with doubts about the catastrophic warming scenario that Al Gore and other climate extremists are putting forth.