title: The technologically enhanced natural radiation environment.
mesh_terms: D000337:Aerospace Medicine; D000473:Alkanes / Q000032:analysis; D001417:Background Radiation; D003031:Coal / Q000032:analysis; D003252:Construction Materials / Q000032:analysis; D003359:Cosmic Radiation; D004781:Environmental Exposure; D005308:Fertilizers / Q000032:analysis; D010578:Petroleum / Q000032:analysis; D011827:Radiation; D011883:Radium / Q000032:analysis; D011886:Radon / Q000032:analysis; D012306:Risk; D014501:Uranium / Q000032:analysis; D014878:Water Pollution, Radioactive / Q000032:analysis
chemical_list: D000473:Alkanes; D003031:Coal; D005308:Fertilizers; D010578:Petroleum; D014501:Uranium; D011886:Radon; D011883:Radium