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[寫寫]有關不願面對的真相

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What Al Gore doesn't understand about climate change.
高爾所不了解的「溫室效應」
By Steven E. Landsburg

Barring a last-minute intervention by the Supreme Court, the 2007 Nobel Peace Prize will be shared by Albert Gore Jr. Admittedly, Gore has been less of a menace to world peace than some previous laureates (think Henry Kissinger). But there is nothing particularly peaceable about Gore's rhetorical approach to climate policy. At his most pugnacious, Gore has depicted the fundamental trade-off as one between environmental responsibility and personal greed. Of course, as everyone over the age of 12 is perfectly aware, the real trade-off is between the quality of our own lives and the quality of our descendants'.

In other words, climate policy is almost entirely about you and me making sacrifices for the benefit of future generations. To contribute usefully to the debate, you've got to think hard about the appropriate level of sacrifice. That in turn requires you to think hard about roughly half a dozen underlying issues.

1. How much does human activity affect the climate? This is actually a whole menu of questions: What can we expect given the current level of carbon emissions? What if we cut those emissions by half? By two-thirds? And so on. These are questions for physical scientists, not economists or politicians.

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