text: how do emfs (electromagnetic fields) affect the human body?  are they like radiation?   electromagnetic fields cause both ions and electrons to move about.  this can produce heat, damaging effects, or even severe injury depending on the strength and frequency of the emfs.  ions are very important to various physiological processes, same for electron transfer.    too much heat damages cells.  time, distance, shielding and field intensity are important factors in limiting the damages.  under certain circumstances emf can slowly cook a person.  there are stories about navy people using target acquisition (fire control) radars to cook seagulls in flight.  nuclear radiation can affect the nuclei of atoms in addition to the effects for emf.  yes, emf is a type of potentially harmful radiation.  gamma rays and light are powerful varieties of emf.  even weak or slow emf at lower frequencies can sometimes produce headaches and disorientation.  cows in pastures have been adversely affected from both overhead and underground power lines.  death is possible.  we live in a sea of weak emfs.  strong exposures can occur from nearby antennas, especially those used for broadcasting or relaying communications via radio or microwave.  there are meters available for monitoring emf intensities.  the ionosphere and ozone layers of the atmosphere protect us from damaging rays from space.  tv cameras must be wrapped in aluminum foil in some bad emf areas.  i live in a mobile home, this affords some protection too.  generally microwaves and other shorter, more powerful wavelengths are more damaging.  sunburn is a form of emf damage.  similarly you can see in medical work burns from other types of emf exposure.