<prompt> Among the natural radiation, the one that contributes tomore radiation exposure of general populationCosmicTerrestrialRadonConsumer products  <response>: The general population is exposed to radiation primarily from natural background and medical sources.Radon and its decay products may become attached to dust particles that can be inhaled and deposited on the bronchial epithelium in the respiratory tract. Radon is estimated to be responsible for approximately 73 of the background exposure of the worlds population. Key Concept 