![]() There can be large variances in natural background radiation levels from place to place, as well as changes in the same location over time. Cosmic radiation from space also contributes to the background radiation around us. The human body even contains some of these naturally-occurring radioactive minerals. Naturally occurring radioactive minerals in the ground, soil, and water produce background radiation. is present on Earth at all times. The majority of background radiation occurs naturally from minerals and a small fraction comes from man-made elements. ![]() The majority of background radiation occurs naturally and a small fraction comes from man-made elements. Background radiation Background radiationRadiation that is always in the environment.
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