refers to the electric and magnetic fields which surround both big power lines that distribute power and the smaller but closer electric lines in homes and appliances.
Electric and magnetic fields are created whenever electricity flows through a conductor. These fields exist near power lines, in the wiring in your home, and near and in any electrical appliance or device.
The force fields around an electric conductor that has voltage and current. "EMF" is often used (as in this document) to describe power-frequency-induced magnetic fields.