Part 1 Atmosphere-Rock-Water Interactions: Acquisition of Solutes and Regulation of the Composition of Natural Waters; W. Stumm. Regulation of Drainage Water Composition by Biotic Processes in Terrestrial Ecosystems; N. van Bremen. Aquatic Carbonate Systems - Chemical Processes in Natural Waters and Global Cycles; R. Wollast, J.P. Vanderborght. Modelling of Heterogeneous Chemistry in the Global Troposphere; J. Lelieveld. Part 2 Metals, Nutrients and Organic Carbon: Biogeochemistry of Organic Matter in Coastal Waters; G. Cauwet, A. Saliot. Microbial Transformation of Metals in Relation to the Biogeochemical Cycle; F. Baldi. Metal Speciation - Concepts, Analysis and Effects; L. Sigg, Hanbin Xue. Light-Induced Processes in the Aquatic Environment; B. Sulzberger, S.I. Hug. Trace Metal/Phytoplankton Interactions in the Sea; W.G. Sunda. Optical Remote Sensing of Marine Ecosystems - Bio-Geochemical Implications of Ocean Colour, Marine Productivity and Atmospheric Interactions; C.N. Murray, V. Barale. Part 3 The Solid-Water Interface: Reactions at the Mineral-Water Interface; L. Charlet. Surfaces Processes in Water Technology; S.A. Banwart. Part 4 Transformation, Degradation and Transport of Pollutants - Spatial and Temperal Scaling: Sources and Reactivity of Reductants Encountered in Aquatic Environments; A.T. Stone, K.L. Godtfredsen, Baolin Deng. Abiotic Transformation Pathways of organic Chemicals in Aquatic Ecosystems; E.J. Weber. Coupled Processes in Reaction-Flow Transport of Contaminants; G. Bidoglio. Scale Effects in the Transport of Contaminants in Natural Media; Ph. Behra. Modelling the Hydrologic and Biogeochemical Response of a Catchment Area to Anthropogenic Inputs; T. Paces. Spectral Properties of Soils and the Use of Optical Remote Sensing Systems for Soil Erosion Mapping; J. Hill.