Artificial sources account for approximately ________ of annual radiation exposure to a human.

Question

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Artificial sources of radiation include medical imaging (such as X-rays and CT scans), radioactive substances for medical treatments, nuclear power plants, and consumer products like smoke detectors. While these sources contribute to radiation exposure, they only account for a minority (about 20%) of annual radiation exposure to humans. The majority of exposure comes from natural sources like cosmic radiation and radon gas.

Artificial Sources Account for Approximately ________ of Annual Radiation Exposure