Part 1 Introduction - origins and occurrence of plutonium: environmental plutonium - creation of the universe to 21st century mankind, D.M. Taylor; plutonium in the marine environment at Thule, NW-Greenland after a nuclear weapons accident, H. Dahlgaard et al; isotropic ratio of Pu released from fuel cycle facilities -importance of radio-chemically pure 236Pu as a tracer, H. Yamana et al. Part 2 Analytical methodologies: plutonium measurement using accelerator mass spectrometry - methodology and applications, D. Oughton et al; ICP-MS analysis of environmental plutonium, Y. Muramatsu et al; methods for applying plutonium fission track analysis, L.C. Sun and Y.-H. Xue. Part 3 Speciation and distribution of plutonium in the environment: distribution and movement of environmental plutonium, G.R. Choppin and A. Morgenstern; the preliminary development of a plutonium in blood plasma equilibrium model, J.R. Duffield; actinides associated with particles, B. Salbu; speciation and transformation of sorbed Pu on geologic materials - wet chemical and spectroscopic observations, M.C. Duff; a plutonium geochemical database for performance analysis of high-level radioactive waste repositories, M. Yui et al; studies of the speciation, colloidal association and remobilization of plutonium in the marine environment, P.I. Mitchell et al; microbial transformations of plutonium and implications for its mobility, A.J. Francis; interaction of Pu, Np and Pa with anacrobic microorganisms at geologic repositories, T. Sasaki et al. Part 4 Case studies: global transport of plutonium from Nagasaki to the Arctic - review of the Nagasaki Pu investigation and the future, A. Kudo et al; long-term trends of plutonium fallout observed in Japan, K. Hirose et al; the behaviour of plutonium in the Pacific Ocean, H.D. Livingston et al; plutonium in temperate and Arctic lakes, M. Eriksson et al; plutonium - the legacy of Sellafield, P.J. Kershaw et al; characteristics of cumulative deposition of fallout Pu in environmental samples collected in South Korea, M.H. Lee and C.W. Lee; plutonium mobility and its fate in soil and sediment environments, Y. Mahara and A. Kudo; the present radiological situation at the nuclear weapons test site at Semipalatinsk in Kazakhstan with regard to plutonium contamination, G.M. Voigt et al; some aspects of plutonium in and around the former Soviet Union's Semipalatinsk nuclear test site, M. Yamamoto et al; plutonium in the environment of Poland (a review), J.W. Mietelski; a review of plutonium releases from the Savannah River site, subsequent behaviour within terestrial and aquatic environments and resulting dose to humans, T.G. Hinton and J.E. Pinder III; closing overview and discussion, D.M. Taylor.