May 1, 2006
John F. Kennedy School of Government, Harvard Universtiy

In February 2005, the Kyoto Protocol to the United Nations Framework Convention on Climate Change came into force, but without participation by the United States. Its impacts on emissions of greenhouse gases—including carbon dioxide (CO2), the primary anthropogenic driver of climate change—will be trivial; but scientific (Robert T. Watson, 2001) and economic (Charles D. Kolstad and Michael A. Toman, 2001) analyses point to the need for a credible international approach.

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