The risk of injuries and damages from non-ionizing radiation is most commonly thought of in relation to cell phones, RF antenna systems, microwaves and extremely low frequency radiation from power lines.
Cell Phones
Cell phones have become an integral part of our society. Although they have greatly improved communications, controversy still surrounds cell phone use, particularly whether cell phone radiation is dangerous to humans, possibly causing cancer in the form of brain tumors. Cell phone litigation is discussed below.
RF Antenna Systems
RF antenna systems are everywhere, including on the rooftops of commercial and municipal buildings, the peaks of water towers, and even church steeples. Third-party workers like painters, roofers, HVAC technicians, and electricians who work near RF antenna systems are the most likely to be exposed to high levels of RF radiation. While Federal Communications Commission licensees maintaining RF transmitting antennas generally have protocols in place requiring that the antennas be powered down during routine maintenance work, these protocols do not cover third-party workers who work near these antennas and are often unaware of the potential dangers.
The risks posed by RF antenna systems are thought to vary by the power of each transmitter and the number of transmitters present. Although transmitters can radiate at high power levels, most do not radiate significant power in any one direction. Studies of rooftop base-station antennas have concluded that maintenance personnel or others with access to high-powered paging antennas on rooftops could be exposed to high levels of RF radiation. For sector-type antennas, exposures to high levels of RF radiation are only likely if workers operate very close to or directly in front of the antennas. Some governmental agencies have reported that antenna maintenance workers who climb antenna structures for painting, repairs, or other purposes could be exposed to high levels of RF energy, especially when multiple and powerful transmitters are present.
The effects of exposure to RF radiation are uncertain and vary by degree of exposure. There is no substantial scientific agreement that the low levels of RF energy encountered by the public every day can have side effects for humans or that wireless phone use causes cancer or other conditions. It is generally agreed, however, that extremely high levels of RF radiation can cause harmful biological effects in humans by increasing body temperatures and heating biological tissue. Some say that the side effects of over-exposure to RF radiation include cognitive disorders, memory lapses, headaches, or attention disorders, although none of these alleged side effects has yet been confirmed by widely accepted scientific evidence. Despite extensive research into the biological effects of RF radiation sponsored by government agencies such as the Department of Defense, there is not yet a confirmed link between RF exposure and cancer or certain other ailments in humans.
The International Agency for Research on Cancer has classified radiofrequency electromagnetic fields as a “2B” substance, which means that the “agent (mixture) is possibly carcinogenic to humans”. Other substances in the “2B” group include coffee, asphalt, and gasoline.
Microwaves
Microwaves occupy the upper part of the radiofrequency spectrum and have a wide range of applications, including speedometers, telecommunications, medical treatment of muscle soreness, and the curing of rubber and resins. The most common consumer use of microwave energy is in microwave ovens. The Food and Drug Administration has regulated the manufacture of microwave ovens since 1971 and has ruled the ovens safe for use if they meet the federal standards for leakage, which are set far below the levels known to harm people. While research continues regarding the effect of low level microwave radiation, it has been established that accidental exposure to high levels of microwave energy -- much more than the allowable oven leakage -- can cause damage to human eyes, testes and sperm by heating body tissues.
Extremely Low Frequency Radiation
Electromagnetic fields (EMF) are a combination of electric and magnetic fields of energy that surround any electrical device that is plugged in and turned on. EMFs are found near power lines, wires, and other electrical devices. The fields from power lines have a much lower frequency than other types of EMF such as microwaves or radio waves; EMF from power lines is considered to be Extremely Low Frequency (ELF). While studies have not clearly shown that exposure to ELF radiation increases cancer risk, some scientists advise the public to limit the amount of time spent in proximity to EMF sources and to increase the distance from the source when possible.