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Global Warming: Russian analysts accuse Britain's Meteorological Office of cherry-picking Russian temperature data to "hide the decline" in global temperatures. Is Copenhagen rooted in a single tree in Siberia? Michael Mann, a Penn State meteorologist, wrote in Friday's Washington Post that "stolen" e-mails from the University of East Anglia's Climate Research Unit still don't alter the evidence for climate change. Mann, a creator of the discredited hockey-stick graph used in reports from the U.N.'s Intergovernmental Panel on Climate Change to show man-made warming, attacks climate skeptics, including former Alaska Gov. Sarah Palin, saying they "confuse the public." Chutzpah has been...

I cannot condone some things that colleagues of mine wrote or requested in the e-mails recently stolen from a climate research unit at a British university. But the messages do not undermine the scientific case that human-caused climate change is real. The hacked e-mails have been mined for words and phrases that can be distorted to misrepresent what the scientists were discussing. In a Dec. 9 op-ed, former Alaska Gov. Sarah Palin argued that "The e-mails reveal that leading climate 'experts' ... manipulated data to 'hide the decline' in global temperatures." Yet the e-mail she cites was written in 1999,...