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Between June 2003 and October 2003: NASA Administrator Tells Climate Scientist that He Should not Discuss Human-Caused Climate Change

When climate scientist James Hansen gives NASA administrator Sean O’Keefe a presentation on the dangers of human-caused climate change, O’Keefe cuts him off. “The administrator interrupted me,” Hansen later says. “He told me that I should not talk about dangerous anthropogenic interference, because we do not know enough or have enough evidence for what would constitute dangerous anthropogenic interference.” (O’Keefe’s spokesperson will later deny this account of the meeting.) Hansen’s presentation to O’Keefe was a summary of another presentation, titled “Can we defuse the global warming time bomb,” that he already gave to the White House Council on Environmental Quality in June 2003. (Hansen 10/26/2004 pdf file; Revkin 10/26/2004)


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