Are EMFs Hazardous to Our Health?
Electrical Fields Classified as Carcinogenic
Can electromagnetic fields (EMF) from power lines, home wiring, airport and military radar, substations, transformers, computers and appliances cause brain tumors, leukaemia, birth defects, miscarriages, chronic fatigue, headaches, cataracts, heart problems, stress. nausea, chest pain, forgetfulness, cancer and other health problems?
Numerous studies have produced contradictory results, yet some experts are convinced that the threat is real.
Dr. David Carpenter, Dean at the School of Public Health, State University of New York believes it is likely that up to 30% of all childhood cancers come from exposure to EMFs. The Environmental Protection Agency (EPA) warns "There is reason for concern" and advises prudent avoidance".
Martin Halper, the EPA's Director of Analysis and Support says "I have never seen a set of epidemiological studies that remotely approached the weight of evidence that we're seeing with EMFs. Clearly there is something here."
Concern over EMFs exploded after Paul Brodeur wrote a series of articles in the New Yorker Magazine in June 1989. Because of Paul Brodeur's reputation. his articles had a catalytic effect on scientists, reporters and concerned people throughout the world.
In November 1989, the Department of Energy reported that "It has now become generally accepted that there are, indeed, biological effects due to field exposure."
The EMF issue gained more publicity in 1990 when alarming reports appeared in Time, the Wall Street Journal, Business Week and popular computer publications. ABC's Ted Koppel and CBS's Dan Rather both aired special segments on EMFs.
In addition to the long-term health concerns, buying a house with high fields will be an economic disaster. In a few years, when power line radiation is as well known as asbestos and radon, a house with high fields will be practically impossible to sell. Already there are hundreds of lawsuits regarding EMFs and property devaluation.
EPA Says the Threat Is Real
By 1990, over one hundred studies had been conducted worldwide. Of these, at least two dozen epidemiological studies on humans indicated a link between EMFs and serious health problems. In response to public pressure, the Environmental Protection Agency IEPA) began reviewing and evaluating the available literature.
In a draft report issued in March 1990, the EPA recommended that EMFs be classified as a Class B carcinogen -- -a "probable human carcinogen and joined the ranks of formaldehyde, DDT, dioxins and PCBs.
After the EPA draft report was released, utility, military and computer lobbyists came down hard on the EPA. The EPA's final revision did NOT classify EMFs as a Class B carcinogen Rather, the following explanation was added:"
At this time such a characterization regarding the link between cancer and exposure to EMFs is not appropriate because the basic nature of the interaction between EMFs and biological processes leading to cancer is not understood."
Curiously, this rather unusual logic appears on the same page as the following: "In conclusion, several studies showing leukaemia, Iymphoma and cancer of the nervous system in children exposed to supported by similar findings in adults in several/ occupational studies also involving electrical power frequency exposures, show a consistent pattern of response that suggest a causal link. "
When questioned about the contradictory nature of these statements, the EPA responded that it was "not appropriate" to use the probable carcinogen label until it could demonstrate how EMFs caused cancer and exactly how much EMF is harmful.
This explanation does not satisfy many critics who claim that the EPAs upper management was influenced by political and economic considerations exerted by utility, computer and military lobbyists.
How Do I Measure EMFs?
A Gauss is a common unit of measurement of magnetic field strength. A Gauss meter is an instrument which measures the strength of magnetic fields. Inside a Gauss meter there is a coil of thin wire, typically with hundreds of turns. As a magnetic field radiates through the coil, it induces a current, which is amplified by the circuitry inside the Gauss meter.
Gauss meters may vary in the strength of the magnetic field they are capable of measuring. A meter used for measuring EMFs from power lines, transformers, substations and appliances around the home, for example, should be able to measure as low as .1 mG.
Gauss meters vary widely in price and accuracy. Meters have either a single axis coil or a triple axis coil. Single axis meters are much simpler than triple axis meters to manufacture and thus, are less expensive.
To use a single axis meter you must point the meter's one sensor in three directions -- -the x, y and z axis. Then, you combine the three readings in a mathematical equation to calculate the combined field strength. Obviously, it’s far easier and more accurate to use a 3-axis meter. Triple axis Gauss meters are quite accurate, but they are also more expensive.
Another thing to watch out for when purchasing or renting a Gauss meter is whether or not it is frequency weighted. Most meters will read the same EMF strength no mater what the frequency.
As the human body appears to be sensitive to both the field strength AND the frequency, Gauss meters used for biological purposes should be "frequency weighted".
This means that if the field is different than 60 Hz the meter will consider the frequency and use it in calculating and displaying the EMF's strength. This feature is why frequency weighted meters will show a higher EMF reading than those meters typically used by electricians and engineers.
Power Lines
Substations
Transformers
Even when the electrical service is underground, you will often see a metal box (usually square} located on the ground near the street. Many people don't realize that when they see a transformer, the power line feeding the transformer is 4000 to 13,800 volts.
The transformer then reduces the voltage to the 120/240 volts needed by nearby homes. Since these transformers can be seen in almost every neighbourhood, they are a source of concern.
EMFs near a transformer can be quite high, but due to its small structure, the field strength diminishes rapidly with distance, as it does from any point source. For this reason, having a transformer located near your home is usually not a major source of concern, although just to make sure, everyone should measure the field strength around it.
Home Wiring
Sometimes, the source of a high magnetic field is incorrect wiring. If you suspect that your home is wired improperly, obtain the services of a licensed electrician. Warning: Do not touch electric wires, even if you think the current is turned off. If you need to disconnect electrical circuits to determine the source of magnetic fields, you should call a licensed electrician.
Computers
The Swedish safety standard, effective 711/90, specifies a maximum of 0.25 mG at 50 cm from the display. Many US manufactured computers have EMFs of 5 - 100 mG at this distance. And know this too: the screens placed over monitors do NOT block EMFs. Not even a lead screen will block ELF and VLF magnetic fields.
Space does not permit a more thorough discussion of computers. If you use a computer, it is important that you measure your EMF exposure with a Gauss meter and review the literature concerning the health impacts of computer use.
Electric Blankets and Waterbeds
This pioneering work was performed by Dr. Nancy Wertheimer and Ed Leeper, who originally discovered that magnetic fields were linked to childhood leukaemia. Similar health effects have been noted with users of many electric blankets and waterbed heaters will emit EMFs even when turned off.
The devices must be unplugged to delete the EMF exposure Additionally, there is the issue regarding the vibrations that are generated by sleeping on standing water. There is less hard data in this area but some experts are concerned about the consequences.
Electric Clocks
Fluorescent Lights
Microwave Ovens and Radar
When measuring microwaves from military and airport radar sources, 100% accurate readings can only be found with extremely expensive digital peak-hold meters. Why? Because analog devices begin to drop their reading immediately after the radar sweep passes. Thus, while an analog meter can show whether or not you are being exposed to radar EMFs, analog meters can't show your true exposure. Although thousands of dollars to purchase, digital-hold meters capable of accurately detecting radar EMFs can be rented for several hundred to over a thousand dollars per month.
Telephones and Answering Machines
Some brands emit no measurable fields and others emit strong fields that travel several inches....right into your brain. Answering machines, particular those with adapter plugs (mini-transformers), give off high levels of EMFs.
Electric Razors and Hair Dryers
Prudent Avoidance
Most experts agree that limited, non-chronic exposure to EMFs is not a threat. For example, it is probably acceptable for a person to be near a toaster in the morning.
BUT, it is not advisable for a person to sleep under an electric blanket, up close, live near a powerline/substation, and sleep in a room where the power enters the home. This person is under an extreme case of chronic exposure. This condition, unfortunately, applies to millions of Americans.
If you wish to follows the EPA's advice and practice "prudent avoidance" then the following advice is offered:
Measure your home, work and school environments with a Gauss meter Measure EMFs both inside and outside your home. Don't let your children play near power lines, transformers, radar domes and microwave towers.
Avoid areas where the field is above 1 mG. Measure the EMFs from appliances both when they are operating and when they are turned off. Some appliances (like TVs) are still drawing current even when they are off.
Don't sleep under an electric blanket or on a waterbed. If you insist on using these, unplug them before going to bed (don't just turn it off). Even though there is no magnetic field when they are turned off, there may still be a high electric field.
Don't sit too close to your TV set. Distance yourself at least 6 feet away. Use a Gauss meter to help you decide where it is safe to sit.
Rearrange your office and home area so that you are not exposed to EMFs from the sides/backs of electric appliances and computers. In the home, it is best that all major electrical appliances, such as computers, TVs, refrigerators etc, be placed up against outside walls. That way you are not creating an EMF field in the adjoining room.
Don't sit too close to your computer. Computer monitors vary greatly in the strength of their EMFs, so you should check yours with a meter. Don't stand close to your microwave oven. Move all electrical appliances at least 6 feet from your bed. Eliminate wires running under your bed. Eliminate dimmers and 3-way switches.
Be wary of cordless appliances such as electric toothbrushes and razors. You may choose not to wear a quartz-analog watch because it radiates pulsating EMFs along your acupuncture meridians.
An older mechanical windup watch would be an acceptable alternative. It is also recommended to wear as little jewellery as possible and to take it off at night. Many people have metal sensitivity which can be aggravated by placing it right on the skin. Measure with a gauss meter to be sure.
And last, but not least, always always always remember that EMFs pass right through walls. The EMF you are reading on your Gauss meter could be radiating from the next room...or from outside your home.
Additional Radiation Info:
What EMF Level Is Safe?
Thus, any reading higher than 0.5 mG is above the "usual" ambient exposure. Many experts and public officials, as well as the few governments that have made an effort to offer public protection, have adopted the 3 mG cutoff point. The EPA has proposed a safety standard of 1 mG. Sweden has set a maximum safety limit of 1 mG.
Dr. Robert Becker, an MD who has been studying the effects of EMFs for 20 years, states a l mG safety limit in his book Cross Currents. When electricians try to solve a magnetic field problem they do their best to drop the level to 1 mG or below.
Dr. Nancy Wertheimer, a Ph.D. epidemiologist who has been studying EMFs for 20 years, has been looking at the epidemiological data in a different way -- she is trying to associate EMF levels with health rather than disease. The level she is coming up with is a cut off of 1 mG. Russian researchers claim that 1/1000ths of a mG should be the standard.
The BioElectric Body believes that there are several stages of health between "optimum wellness", "degenerative disease" and "Cancer". Thus, we maintain our own living and sleeping quarters at 0.5mG and below.
Recommended Reading
Currents of Death - The Attempt to Cover Up the Threat to Your Health Paul Brodeur Simon and Schuster, 1989
Electromagnetic Man Health & Hazard in the Electrical Environment Cyril W. Smith & Simon Best St. Martin's Press. Inc. 1989
People often ask why I live in a rainforest with no mobile phone access or mains electricity. – R.A.
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