The Congressional Budget Office has produced another in its series of useful studies, The Economics of Climate Change: A Primer, which was written by Robert Shack-leton. In the "Preface," Douglas Holtz-Eakin, the Director, writes, "A scientific consensus is emerging that rising atmospheric concentrations of greenhouse gases are gradually changing the Earth's climate, although the magnitude, timing, and effects of the alteration remain very uncertain. The prospect of long-term climate change raises a variety of domestic and international economic policy issues on which there is little accord. Considerable disagreement exists about whether to control greenhouse gas emissions, and if so, how and by how much; and whether to coordinate climate-related policies at the international level, and if so, through what mechanisms." April 2003.
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