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Radioactive radiation, also known as ionizing radiation, originates from unstable atomic nuclei that release energy in the form of particles or electromagnetic waves. The sources of radioactive radiation can be broadly classified into natural and artificial origins. Natural sources include cosmic radiation from outer space, terrestrial radiation from naturally occurring radioactive materials in the earth’s crust, and internal radiation from radioactive isotopes present in the human body. Cosmic radiation mainly consists of high-energy particles from the sun and other celestial bodies. Terrestrial radiation arises from elements such as uranium, thorium, and radon, which are present in rocks, soil, and water. Radon, a colorless and odorless gas, is one of the most significant contributors to natural radiation exposure and tends to accumulate in enclosed spaces like homes and mines. Internal radiation is received when radioactive isotopes such as potassium-40 or carbon-14 are ingested through food, water, or air, becoming part of the body’s tissues and organs. Artificial sources of radioactive radiation are primarily linked to human activities. These include medical applications, industrial uses, nuclear power generation, and nuclear weapons testing. In the medical field, X-rays, computed tomography (CT) scans, and nuclear medicine procedures expose patients to controlled doses of radiation. Industrial applications involve radiography for material inspection, sterilization of medical equipment, and irradiation of food for preservation. Nuclear power plants generate radioactive waste, which, if not properly managed, can release radiation into the environment. Additionally, past nuclear weapons testing has contributed to global radioactive contamination, leaving a ___ _____ ___ _______ ________ ______ __________ ___ ___.
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