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247 deep ocean water. Later, this was rejected by the public and in violation of an international treaty because of the possibility of harming the ocean. Another problem to the environment is the leakage of radioac- tive waste from space. This problem is not pollution to the earth’s envi- ronment, but pollution of space. There is no way to dispose of the nu- clear waste in space. The most significant drawback on this controversial issue is the threat of a disaster. The two most serious situations were the accident at Chernobyl and the explosion of the hydrogen bomb on Hiroshima. The first time that people discovered the dangers of nuclear power was when the atomic bomb was dropped, August 6, 1945, on Hiroshima. The effects of the bomb was that it destroyed 4.7 square miles of the city. Approximately 70,000 people were killed and about another 70,000 people were injured. Many people died later as a result of nu- clear radiation and radiation sickness. The most serious nuclear disaster was the Chernobyl accident that occurred April 26, 1986 in the Soviet Union. An accurate number of deaths as a result of this accident is very hard to determine due to the secrecy of the U.S.S.R. surrounding this accident. A study done by a team of scientists from both the United States and Japan has shown that there has not been any evidence found of genetic mutation, which are changes in heredity, in the children of the survivors of the bombing of Hiroshima. Following the Chernobyl accident, Soviet scientists suggest that there is evidence that radiation has exhibited genetic mutation in the parents who were exposed to radiation. According to them, the muta- tion was found in sperm and egg cells, which contain the genetic build- ing blocks of future generations. The child’s DNA is a combination from both parents’ genetic makeup. When there is any sequence that the child has, but that sequence was not found in either parent, then this is called germline mutation. Ten years after the accident that occurred at Chernobyl, evidence of mutation, in the exposed areas of the country, indicates that radiation changed genetic makeup and that this has