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Influence of radio frequency (RF) and mircowave radiation on human body is studied. According to Rai (1992) radio and T.V. transmission towers of Varanasi, which are located in thickly populated area, are causing health hazards problems to the people. Theoretical analysis shows that a transmission tower of 10 kW is expected to cause harmful effects on the people living upto about 300 m. For low power transmitters the distance is smaller. The radiation is more hazardous if a high voltage power transmission line is also passing over the area, as the combined effect of the two radiations may cause cancer risk to the people (Tenferde 1996).