ABSTRACT
The primary sources of ‘thermal’ electrical pollution occur at radio frequencies, especially at ultra-high frequencies and microwaves. Thermal effects on man have generally been accidental; these are often reported when they are of occupational origin. Athermal effects are almost impossible to detect. Some studies have been made with human volunteers, subjected to controlled electrical pollution, to determine if there really are such effects. At the outset, one is forced to say that there have probably been relatively few recognised occurrences of known electrical pollution. One can speculate that if such occurrences were widespread, there would be greater public interest in electrical pollution. The phenomenon of phosphenes is the sensation of light flashes in the eye. The flashes are colourless or faintly tinted blue or yellow. Effects on the cardiovascular system are listed in three categories, as follows: reduced blood pressure; slow heart beat; electrocardiograph changes.
