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Was there a discernible set of changes in the techniques of arable farming, animal husbandry and their associated technologies at the end of antiquity which marked a clear break with an established 'ancient world economy' and ushered in the 'new agricultures' of the early middle ages? Were such changes not already visible in antiquity? And what was the impact of political, economic, social and environmental change in these processes? The 6 papers in this volume reject simple evolutionary models charting progress from "protohistory" to the "Roman period" to the "Dark Ages" to the "Middle Ages"...

Over the past fifteen years regulatory agencies have relied on their approaches to characterise and control the release of toxic substances into the aquatic environment: a GC/MS analysis for U.S. EPA designated 126 priority pollutants and 132 dangerous substances according to the European 76/464/CEE Directive and on the bioassays with aquatic bioorganisms."Emerging Contaminants" correspond in most cases to irregulated contaminants, e.g. surfactants, pharmaceuticals and personal care products (PPCP), or gasoline additives.These two volumes, 5/I and 5/O, of this Handbook deal with the...