We love electrical gadgets, particularly new mobile wireless devices such as "smartphones." And we demand more and better connectivity -- cell phone towers, WiFi networks, home wireless routers, etc. Wireless television -- now being aggressively promoted by Bell Canada -- will further increase demand.
An unavoidable trade-off is that we are bathed in radiation. At one end of the electromagnetic spectrum is extremely low-frequency (ELF) radiation. Power lines produce ELF radiation at 50-60 Hertz (Hz, or cycles per second), similar to the frequency of our heartbeats. The middle of the electromagnetic spectrum is occupied by radio frequency (RF) radiation, used for AM and FM radio, television and cell phones. Next comes infrared radiation, followed by the visible portion of the spectrum, ultraviolet rays, x-rays, and finally, gamma rays.
