All objects in nature, as long as the temperature in the absolute temperature above zero, are in the form of electromagnetic waves constantly transferring heat to the outside world, this way of transmitting energy is called radiation.
Radiation is everywhere!
Home appliances: TV, refrigerator, air conditioning, microwave ovens, vacuum cleaners, computers, etc.
Office equipment: cell phones, computers, copiers, electronic instruments, medical equipment, etc.
Home décor: marble, laminate flooring, wallpaper, paint, etc.
Surrounding environment: TV (radio) signal towers, nuclear radiation, etc.
Natural environment: sunspots, etc.
The human body to a certain range of radiation resistance, but nevertheless, we are in order to health, or to strengthen the precautionary approach, such as chassis shells do not arbitrarily dismantle the chassis as far as possible with the distance between themselves, or the use of radiation chassis cover and so on for a certain degree of isolation.