Airborne radioactivity in buildings.
D000398:Air Pollution, Radioactive; D003252:Construction Materials; D006801:Humans; D001239:Inhalation; D008168:Lung / Q000528:radiation effects; D008954:Models, Biological; D011829:Radiation Dosage; D011886:Radon; D013910:Thorium
D013910:Thorium; D011886:Radon