Atoms, Nature, and Man: Man-made Radioactivity in the Environment

The booklet surveys how human releases of radioactivity altered natural background levels and outlines the scientific response: radiobiological concepts, measurement methods, and field studies that trace radionuclides through air, water, soil, and food chains. It reviews past environmental investigations, treats land, ocean, and atmosphere as interconnected subenvironments, and emphasizes the need for long-term monitoring and interdisciplinary fieldwork. Practical problems and research projects are discussed, along with methodological lessons on using radioactive tracers to reveal ecological pathways and to inform assessment of cumulative effects and resource-management decisions.