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dence that the "smoking gun" might be a mushroom cloud. Their spirit of vigilance was applied to Iraqi weapons of mass destruction, which turned out not to exist - but not to climate change, which does. In a meeting in Montreal last December, the chief American delegate, Harlan L. Watson, got so peeved about a proposal for new global "mechanisms" to carry out the 1992 Kyoto Protocol that he walked out. The American side relented after the wording was softened to "opportunities," and there's now at least a hope for future talks about talks about global warming.
But woe unto any administration official who becomes so concerned about global warming that he actually tries to sound the alarm. James E. Hansen, the top climate scientist at NASA, found that political minders at NASA headquarters had ordered a review of his lectures, papers, interviews and Internet postings after he called for quick reductions in greenhouse gas emissions to ease global warming. A 24-year-old former Bush campaign worker who allegedly had been involved in efforts to muzzle Hansen later resigned - after reports surfaced that he had fudged his résumé.
Usually, America's political antics are forgivable, but not on this issue. As evidence grows that human activity is accelerating dangerous changes in the world's climate, the Bush administration's excuses for inaction are running out. History will not forgive political leaders who failed to act on this issue, and neither should voters.
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