Anything that is powered by electricity, when it is operating and current is flowing is a source of a magnetic field.
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Electromagnetic, that is to say electrical and magnetic fields (EMF) both natural and electrically produced, exist throughout our environment and we are all exposed to them constantly. Electric fields are produced by electric charges and measured in volts per metre (V/m) whilst magnetic fields are produced by the motion of electric charges and measured in amperes per metre (A/m).
Whether or not these fields are harmful has been a matter of some debate for many years and remains largely unresolved.