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The Earth's climate in the late twentieth century was the warmest in at least the last 400 years and likely the warmest in the last millennium, a U.S. National Research Council (NRC) panel confirmed in a 22 June report.

“The committee finds it plausible that the Northern Hemisphere was warmer during the last few decades of the twentieth century than during any comparable time during the previous millennium,” said panel chair Gerald North, a geoscientist at Texas A&M University, College Station.