Cities take on global warming

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President Bush has declined to sign the Kyoto Protocol, the treaty designed to cool global warming. The White House says Kyoto would put the U.S at a competitive disadvantage. But more than 150 American cities have decided to comply with Kyoto anyway. They say they're thinking globally, but they also admit it helps them economically, and, as Curt Nickisch reports, it gives them a competitive advantage.