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Radiation is an invisible pollutant that can be highly dan-j gerous. Nuclear radiation comes from radioactive substances ,! including waste from nuclear weapons testing and from nude- • ar power plants. Amounts of electromagnetic Small radiation are produced by a variety of electronic devices including comput- ers, lasers, microwave ovens, TVsets, and X-ray Player machines.
Scientists have not determined exactly what effects small amounts of radiation influence people. Exposure to large But amounts can cause cancer and harmful changes in reproduc¬tive cells.
International agreements ban most testing of nuclear weap¬ons in the atmosphere. Such regulations have helped to elimi¬nate the major sources of radiation. However, the amount of radioactive waste is constantly increasing. Scientists are study¬ing the ways to eliminate these wastes safely and permanently.
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