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Similar term(s): electromagnetic radiation.
Electromagnetic fields (EMF) are a combination of invisible electric and magnetic fields of force. They occur both naturally and due to human activity.
Source: GreenFacts
Naturally occurring EMF are for example, the earth static magnetic field to which we are constantly exposed, electric fields caused by electrical charges in the clouds or by the static electricity produced when two objects are rubbed together as well as sudden electric and magnetic fields caused by lightning, etc.
Man-made electromagnetic fields (EMF) are for example generated by extremely low frequency (ELF) sources, such as power-lines, wiring and appliances as well as by higher frequency sources such as radio and television waves and, more recently, cellular telephones and their antennas.
Source: GreenFacts
Magnetic field - Electric field
Deutsch: Elektromagnetische Felder (EMF)
Español: Campo Electromagnético (CEM)
Français: Champ électromagnétique (CEM)
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