Global Warming Needs Cool Heads

The issue of global warming throws off more ideological heat than scientific light or economic insight. Five years after the first Earth Summit in Rio de Janeiro, what we don't know is still a multiple of what we do know. The science is better but not good enough. The good intentions of well-meaning people notwithstanding, caution and not crisis should guide U.S. policy in reducing greenhouse gases. The U.S. should not ignore the potential harm from global warming but it must act pragmatically, not emotionally.

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