Eastern Regional Radon Training Center - Provides training in the health risks posed by radon gas and the methods of radon measurement and mitigation in residential, institutional, and commercial environments. AARST - American Association of Radon Scientists and Technologists, a professional association for those engaged in the research, testing, measurement and remediation of radon. Risk Assessment of Radon in Drinking Water - The National Academy of Sciences report (1999) compares the risks of radon in air and water. Full report can be read online, or purchased. Natural Radioactivity - The Radiation Information Network (Idaho State U). Primordial, cosmogenic and man-made radiation sources. Radon accounts for 56% of the total effective dose to people in the US. Radioactivity in soil, building materials, and human bodies. Uranium - The Deadliest Metal - A detailed paper on uranium, its radioactive products, mining, and radiation risks to people issued by the Canadian Coalition for Nuclear Responsibility (1992). The health risks even at the low radon levels in homes. Integrated Environmental Management - Informative primer on radon, its progeny, measurement and risks. Extensive information on radioactivity and radiation, exposure and risks. How Stuff Works: Radon - Informative article about how radon forms and why it is so dangerous. Comparison of radon test devices. Useful links. Radon Progeny - A chart listing all of the decay products of radon gas in their order of appearance. Atomic mass, atomic numbers and the energy in MeV of the released alpha radiation. Radon Project of Columbia University and Lawrence Berkeley National Lab. - Uses information about location of home, and house construction, to suggest whether or not to test for radon. Indoor Air - Radon - US EPA information resources and links about this gas, its health effects, and its control. Center for Environmental Research and Technology - Provides certification and continuing education classes that meet National Radon Proficiency Program. Located in Colorado Springs, CO. Radon Gas Kills - Educational site about radon, an invisible and odorless gas that increases your risk of developing lung cancer. Radon Guide: Introduction to Radon - Comprehensive guide to radon in the home provided by a firm of consultants in Northern Ireland. Gemmill Laboratories - Pennsylvania company providing radon certification training, radon measurement and mitigation courses and radon instrument calibration courses. Also offers granite radiation testing services. Radon Mitigation and Gas Reduction - Blog about radon gas with information about how to conduct testing and mitigation.