chapter 1 Introduction -- chapter 2 Problems and Needs -- chapter 3 Background of Published Studies on Lead and Wetlands -- chapter 4 Biogeochemical Cycle of Lead and the Energy Hierarchy -- chapter 5 Ecological Assessment of the Steele City Swamps* -- chapter 6 Lead Distribution in Steele City Swamps* -- chapter 7 Experiments with Lead and Acid in Wetland Microcosms* -- chapter 8 Simulation Model of a Lead-Containing Swamp Ecosystem -- chapter 9 Lead and Zinc Retention in the Biala River Wetland of Poland -- chapter 10 Perspectives on Lead and Zinc Manufacturing, and Environment -- chapter 11 The Ecological Economics of Natural Wetland Retention of Lead* -- chapter 12 Emergy Evaluation of Treatment Alternatives in Poland -- chapter 13 The Evolution of Environmental Law and the Industrial Lead Cycle -- chapter 14 Summary, Policy for Heavy Metals and Environment.