Radioactive pollution occurs when radioactive materials are released into the environment through natural processes like radioactive decay of elements in the Earth's crust, interaction of cosmic rays in the atmosphere, and background radioactivity in seawater. Anthropogenic sources of radioactive pollution include nuclear weapons testing, nuclear waste disposal, operations of nuclear power plants, and improper storage and disposal of radioactive materials. The radioactive pollution can enter the food chain and pose health risks to organisms and humans through ingestion of contaminated food and water over time. Proper methods for disposing, storing, labeling and reusing radioactive waste, banning nuclear weapons tests, utilizing alternative energy sources, and individual precautions can help reduce radioactive pollution.