As a result, public anxiety is mounting. In this pamphlet we take a look at the question of EMF health effects - what scientists know about them and what is still speculative. We answer some of the most common questions about EMF and try to put the issue into perspective. NEMA, the National Electrical Manufacturers Association, believes that these questions are important. NEMA also believes that by working together, the electroindustries, government, and scientific and medical communities can put an end to speculation and find answers.
Magnetic fields vary in strength with the current and are present only when the current is flowing.
ELF electric and magnetic fields alternate with the same frequency. Electric and magnetic fields are found throughtout nature. Electromagnetic forces hold together atoms and molecules in all matter and are involved in the transmission of messages through the nervous system. We are constantly exposed to the earth's magnetic field. In our electric environment, we are also regularly exposed to 60-Hz electric and magnetic fields.