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Human Reproduction, Emerging Technologies, and Conflicting Rights. Robert H. Blank and Janna C. Merrick Washington, DC: Congressional Quarterly Press, 1995, 269 pp. US$21.95 cloth. ISBN 0-87187-938-7. Congressional Quarterly Press, 1414 22nd St. NW, Washington, DC 20037, USA.

scientific uncertainties, or where the boundary lies between scientific facts and their political implications, also are discursively shaped (cf. Jasanoff, 1990). In subsequent chapters, the author presents the case study. The book is well researched. Drawing upon many secondary and primary accounts as well as personal interviews with some of the key actors, the author constructs a chronology ofevents linked to ozone policymaking. Anyone interested in the history of ozone diplomacy can learn much from this book. The key to Litfin's analysis is how scientific knowledge and scientific uncertainties were framed into a regulatory discourse based upon the precautionary principle. This discourse was first legitimized with the Vienna Convention in 1985 (even though no CFC controls were instituted at that time) and also dominated discussions leading up to the Montreal Protocol (where CFC controls were instituted). The precautionary discourse was based upon the idea that risks associated with ozone depletion (both the amount and effects) were to some extent uncertain, so appropriate action would involve taking precautions (by limiting CFC production and use) in case the risk is extreme. In subsequent negotiations, a new discourse of "damage limitation" emerged in response to new scientific findings that linked the Antarctic ozone hole to CFCs and which Book Reviews