It is estimated that more than half of the diagnostic X-ray dose received by residents of the United States is unnecessary. In fact, diagnostic X-rays constitute the larget source of man-made radiation exposure to the U. S. Population - larger than that from nuclear power plants or fallout from nuclear-weapons testing. Priscilla Laws describes the three major causes of unnecessary radiation exposure, how radiation increases the risk of cancer and damage to one's genes, and how to minimize your exposure to X-rays. Includes special information on children and pregnant women. The front cover has two bends in it. The back has one bend. 154 pages includes a glossary and notes. 8vo - over 7¾" - 9¾" tall.