Radioactive material on the skin can be easily washed off (decontamination) so that it does not expose you or others to radiation. Radioactive material can contaminate the local food supply and get into the body through eating or drinking tainted food. During a radiation emergency, radioactive material may be released into the air and breathed into the lungs, or it may get into the body through open wounds. The physical area affected by radiation depends on the amount of radiation released, the direction and speed of the wind, and the weather conditions. However, in a radiation emergency, such as a nuclear power plant accident, transportation accident, dirty bomb explosion (a mixture of explosives and radioactive powder or pellets), or nuclear blast, you could be exposed to a large amount of radiation that could be harmful to your health and the health of your family. Radiation from manmade sources, such as x-ray machines, are released in controlled amounts to minimize harmful effects. Small traces of radiation are present in food and water. Each of us is exposed daily to radiation from natural sources, including the sun and the earth. Radioactive atoms in the source (called radioactive material) give off radiation in waves or particles. Radiation, sometimes known as electromagnetic waves, is energy that comes from a source and travels through space at the speed of light.
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