Preface to the Madison Declaration and Critical Synthesis Papers on Mercury Pollution, Methylmercury Exposure and Health Effects in Humans: A Worldwide Concern, Effects of Environmental Methylmercury on the Health of Wild Birds, Mammals, and Fish, A Synthesis of Progress and Uncertainties in Attributing the Sources of Mercury in Deposition, A Synthesis of Progress and Uncertainties in Attributing the Sources of Mercury in Deposition, Recovery of Mercury-Contaminated Fisheries, Socioeconomic Consequences of Mercury Use and Pollution, The Madison Declaration on Mercury Pollution, Preface to Medical Geology Papers, Epidemiological Transitions and the Changing Face of Medical Geology, Iodine Deficiency: An Ancient Problem in a Modern World, Natural Minerogenic Dust and Human Health, Global Impacts of Geogenic Arsenic: A Medical Geology Research Case, Blackfoot Disease in Taiwan: Its Link with Inorganic Arsenic Exposure from Drinking Water, Radon: Sources, Health Risks, and Hazard Mapping, Selenium Deficiency and Endemic Heart Failure in China: A Case Study of Biogeochemistry for Human Health, Selenium Geochemistry and Health, Health Effects of Toxic Organic Substances from Coal: Toward "Panendemic" Nephropathy, Health Impacts of Coal: Facts and Fallacies, Metal Biology: Aspects of Beneficial Effects, Mobilization of Mercury and Methylmercury from Forest Soils after a Severe Storm-Fell Event, Medical Geology: An Opportunity for the Future.