Saturday, 5 March 2011

Electromagnetic Hypersensitivity

Can the electric and magnetic fields (EMF) to which people are routinely exposed cause health effects? What are sources of EMFs, and when are EMFs dangerous?

EMF (or ElectroMagnetic Field) is a broad term which includes electric fields generated by charged particles in motion, and radiated fields such as TV, radio, hair dryer, and microwaves. Electric fields are measured in units of volts per meter or V/m. Magnetic fields are measured in milli-Gauss or mG.

The field is always strongest near the source and diminishes as you move away from the source. These energies have the ability to influence particles at great distances. For example, the radiation from a radio tower influences the atoms within a distant radio antenna, allowing it to pick up the signal. Despite the many wonderful conveniences of electrical technology, the effects of EMF on biological tissue remains the most controversial aspect of the EMF issue, with virtually all scientists agreeing that more research is necessary to determine safe or dangerous levels.

Electromagnetic hypersensitivity (ES) is a physiological disorder characterized by symptoms directly brought on by exposure to electromagnetic fields. It produces neurological and allergic-type symptoms.

Symptoms may include, but are not limited to, headache, eye irritation, dizziness, nausea, skin rash, facial swelling, weakness, fatigue, pain in joints and/or muscles, buzzing/ringing in ears, skin numbness, abdominal pressure and pain, breathing difficulty, and irregular heartbeat.

Those affected persons may experience an abrupt onset of symptoms following exposure to a new EMF such as fields associated with a new computer or with new fluorescent lights, or a new home or work environment.

Meanwhile, some authorities recommend taking simple precautionary steps, such as the following:  Increase the distance between yourself and the EMF source sit at arms length from your computer terminal.  Avoid unnecessary proximity to high EMF sources don't let children play directly under power lines or on top of power transformers for underground lines.  Reduce time spent in the field turn off your computer monitor and other electrical appliances when you aren't using them.

The Office of Technology Assessment of the Congress of the United States recommends a policy of prudent avoidance with respect to EMF. Prudent avoidance means to measure fields, determine the sources, and act to reduce exposure.

Detect EMFs in your home and work environment. It is good to know where the sources of EMF are in your everyday world and how strong these sources are. Is there wiring in the wall behind your bed that you don't even know about? Is the vaporizer emitting strong fields in the baby's room? How much EMF are you and your family getting from the power lines in the street? Even hair dryers emit EMFs. Home inspectors often have meters to measure EMFs, or they can be purchased and shared with friends.

Diminish your exposure to the EMFs you find. Determine how far you must stay away from the EMF emitters in your home and work environment to achieve less than 2.5 mG of exposure the microwave oven, the alarm clock, the computer, and so on. Rearrange your furniture (especially the beds, desks, and couches where you spend the most time) away from heaters, wiring, fluorescent lights, electric doorbells, and other EMF hot spots.

Where practical, replace electric appliances with non-electric devices. . Have an electrician correct faulty high EMF wiring and help you eliminate dangerous stray ground currents.

Shield yourself. Use shielding devices on your computer screen and cellular phone. Add shielding to your household wiring, circuit box, and transformers.   Electric fields in the home, on average, range from 0 to 10 volts per meter. They can be hundreds, thousands, or even millions of times weaker than those encountered outdoors near power lines. 

Electric fields directly beneath power lines may vary from a few volts per meter for some overhead distribution lines to several thousands of volts per meter for extra high voltage power lines. Electric fields from power lines rapidly become weaker with distance and can be greatly reduced by walls and roofs of buildings. Magnetic fields are not blocked by most materials. Magnetic fields encountered in homes vary greatly. Magnetic fields rapidly become weaker with distance from the source. 

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