title: Sources of exposure to technologically enhanced natural radiation.
abstract: The paper presents a review of sources of enhanced natural radiation and their relative importance. Only sources that have been caused by some human technological activity are discussed, even though higher doses may be received by truly natural sources, such as radium rich ground. The distinction between "natural" and "technologically enhanced" sources and the justification of the different sources are discussed.
mesh_terms: D003031:Coal; D003718:Denmark; D004781:Environmental Exposure; D005579:Fossil Fuels; D006115:Greece; D006361:Heating; D006798:Housing; D006801:Humans; D008906:Mining; D009664:Norway; D011827:Radiation; D011868:Radioisotopes
chemical_list: D003031:Coal; D005579:Fossil Fuels; D011868:Radioisotopes