bus or train (higher levels of radiation are required to transmit a signal). Keep cell phones away from your bedroom at night , or even better turn them off. DECT cordless phones are also powered by radiofrequency waves, so swap cordless phones for wired phones in the home. Wi-Fi Wi-Fi networks are becoming increasingly popular in public areas like libraries, schools, airports and coffee shops. For people who work on computers or laptops, risks from radiation exposure are greater due to close proximity to the source and long periods of use. As well as wireless signals, the electronics and power adaptors of these devices are also significant sources of radiation. Top tips for Wi-Fi radiation exposure protection: Avoid placing laptops, tablets or iPads directly on your body. Work from a desk or table, or if you must rest them in your lap, use a pillow or cooling pad between your body and the device. Replace Wi-Fi Internet with cabled connections in your home. Avoid prolonged periods of time in areas where you know there is a high concentration of Wi-Fi networks. Electrical appliances All electronic devices emit levels of radiation, however because many appliances are only used for a short period of time, or the proximity to appliances is low, exposure levels are generally lower than cellphones or wireless devices. Microwave ovens use a very high frequency of radiation to cook food, however the casing of the ovens is built in such a way to contain most of the emitted