The main causes of EMF/EMI include the electricity you receive from the grid (dirty), the electricity you receive from your neighbors who are near you (their usage), and from within your own home (your usage). Your home wiring also acts as a giant super antenna which picks up EMF. There are two types of EMF: 1-Through the air – Wireless, WiFi, Bluetooth, and RF radiation 2-From the wires – electric radiation, magnetic radiation, dirty electricity