Читать книгу Patty's Industrial Hygiene, Physical and Biological Agents - Группа авторов - Страница 15

One is exposed to radiation from both naturally occurring and anthropogenic sources. Natural background radiation includes cosmic radiation that originates in the sun and in the stars, and terrestrial radiation that is emitted from radioactive minerals on or within the earth. These naturally occurring background radiations must be accounted for when making radiation measurements and decisions, and in certain instances may pose a potential health threat.