*Average Radon Concentrations throughout the world reported from the Report of the United Nations Scientific Committee 2000. International radon concentration is meausred in Bq/m3 whereas American radon concentration is measured in pci/L. 1pci/L=37 Bq/m3.
This map was provided by the R. Samuel McLaughlin Centre for Population Health Risk Assessment which is housed within the Institute of Population Health at the University of Ottawa. It was designed by J. M. Zielinski & H. Jiang.
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