Invisible lines of force that surround all electrical devices.
In the last half of the 20th century, concern grew that being in the vicinity of electric power installations caused a variety of illnesses. The occupants of houses close to high voltage overhead distribution lines complained of persistent inexplicable headaches, depression, and other health problems. Some areas around the lines appear to have produced unexplained clusters of leukemia. These problems have been attributed to the unusually high electromagnetic (e/m) low frequency (1/0 fields around such equipment. Evidence to support such a claim is anecdotal. Even if a statistical correlation were to be shown, the connection may just be accidental and may not demonstrate a causal relationship. However, public concern has been sufficient for the matter to be taken seriously.
In Sweden, epidemiological studies showed a possible link of high electric voltage with cancer and in 1992 the Board for Industrial and Technical Development there¬ upon stated that it would assume a connection to be established. Scientists in the United States and Great Britain who studied the problem failed to establish a link. Nevertheless, calls continue for further study.