We humans are in a variety of electromagnetic radiation surrounded by natural magnetic fields, sunlight, etc. will be issued with varying degrees of intensity of radiation, but only when the intensity of the radiation exceeds a certain value (the safety value) when the human body will be harmed, which is what we usually call electromagnetic pollution.
Electromagnetic pollution affecting the human living environment mainly from natural and man-made electromagnetic pollution sources. Natural electromagnetic pollution is caused by certain natural phenomena. The most common is lightning, in addition to electrical equipment, aircraft, buildings, etc. may cause direct harm, but also from a few kilohertz (KHZ) to hundreds of megahertz (MHZ) above the very wide frequency range of the vast area of serious electromagnetic interference. Volcanic eruptions, earthquakes and sunspot activity caused by magnetic storms and other phenomena will also produce electromagnetic interference, natural electromagnetic pollution on the short-wave communication interference is particularly serious.
The man-made electromagnetic radiation is divided into two categories: one is the X-rays and other electromagnetic radiation, they can make the excited material to produce free electrons, so that atoms become charged ions, such radiation is known as ionizing radiation, such as nuclear facilities, radioisotopes and various types of radioactive waste and other radiation, their damage to the human body is huge: the other is radio frequency, microwave electromagnetic radiation, they do not make the dielectric atoms produce free electrons. Dielectric atoms produce free electrons and ionization, but only through the electronic energy level of the leap and absorb energy, this radiation is called non-ionizing radiation.
Non-ionizing radiation according to its radiation frequency can be divided into microwave radiation (300-300000 MHZ) radio frequency radiation (0.1-300 MHZ) and industrial frequency radiation (50 HZ or 60 HZ) three categories. Among them, radio broadcasting, television, radio communication transmitters and other kinds of radio frequency equipment radiation, the impact of the region is larger, has become the main factor of electromagnetic pollution of the environment.
High-voltage equipment is not a source of electromagnetic pollution, residents do not have to worry about the harm suffered by electromagnetic radiation
Normal operating conditions of high-voltage equipment, especially near the transmission lines produced by the radiation is mainly 50 HZ industrial frequency electromagnetic radiation. According to a large number of on-site measurement data show that the influence of industrial frequency electromagnetic radiation is very limited, the substation is concentrated in the greater intensity of industrial frequency electric field near the inlet and outlet lines, and other aspects of the intensity of the industrial frequency electric field in the 2KV / m below. As for transmission lines, outside the range of 10-15m away from the side conductor, the IF EF intensity is less than the recommended standard of 4KV/m for IF EF intensity in residential areas.
In recent decades, a large amount of scientific evidence published by the International Large Power Grid (CIGRE) shows that IF EMR has no adverse impact on human health in the range of 20KV/m or less.
In fact, some of the new substations and transmission lines that have caused controversy among neighboring residents who believe that electromagnetic pollution exists have not only not been found to have exceeded the standard in a single case through on-the-spot electromagnetic monitoring by authoritative departments after the fact, but also have measured data that are often far below the nationally-recommended limit standards.
Liu Zhi Ping
A mother once read a report that described in glowing terms how electromagnetic waves can give children leukemia and other physical and mental illnesses. When she thought of the high-voltage power lines passing near her home, she immediately became nervous and began to worry about the health of the whole family, and every day the tension and worry made the whole family restless.
This is not an isolated incident in people's lives. Television, radio, substations, computers, cell phones ...... and even an electrified metal wire radiate electromagnetic fields. People are worried that those electromagnetic lines of force, which carry energy everywhere, will be a magic sword that kills people invisibly? Are they the ghosts behind the increasingly common tumors, leukemia, neurasthenia, and fetal malformations and other terminal illnesses that afflict modern humans? When mankind entered the era of electrification, people enjoy it to bring all kinds of convenience and create a variety of myths, but also suffered a great psychological torture at the same time.
Now, more and more, we find that everyone's own guesses, doctors' warnings and some scientific studies seem to strongly suggest that staying away from electromagnetic radiation is a major enemy of health and has serious consequences! There was a medical report that stated that people who use computers for 4-6 hours a day are 26% more likely to get cancer three years later than normal people. And in the report, the author sensationalized that: if the head directly to the computer for a long time, people will feel back pain, body resistance is getting weaker and weaker, the spirit often can not concentrate - computer killers "thoracic outlet disease" on the body, more serious! The more serious is the day of Alzheimer's disease or brain tumor will be too late to regret!
Is electromagnetic radiation really a phantom killer that threatens our lives and health? A new study by scientists has found that it is not!
Scientific research unveils Pandora's box
There are many kinds of electromagnetic waves, which are different because of different frequencies, such as visible light waves, ultraviolet and infrared, all because of the different frequencies and the nature of the big difference. In the space we live in, what we have access to are basically low-frequency electromagnetic fields with frequencies of tens of hertz. It is these everyday low-frequency electromagnetic fields that generate the electromagnetic radiation that is feared to cause cancer, abnormal pregnancies, neurological effects, and other human health problems.
In 1979, U.S. epidemiologist Wilhelmer collected a list of children with leukemia, and guessing that the culprit might be power lines, she sought the cooperation of physicist Li Bo. Li Bo could not know the specific strength of the electromagnetic fields to which each child was exposed, the thickness of the wires and their proximity to the human body, the projected dose of electromagnetic field radiation suffered by children. The study, which was based on speculation and assumptions, concluded that children living in high-intensity EMFs generated by electricity were three times more likely to develop leukemia than children living in low-intensity EMFs.
As soon as the study was released, a large number of research organizations in the United States immediately turned to studying the health effects of electromagnetic radiation. In the face of conflicting conclusions, many environmentalists demanded that the state remove power lines and substations from people's neighborhoods, courts were immediately filled with lawsuits, a variety of instruments for measuring and preventing EMFs appeared on the market, and the media began to sensationalize the risks of EMFs in a series of articles, plunging the world into a magic circle of EMFs. People listened to the advertisements and bought EMF protection products (but most of them were cheated), went to hospitals to seek EMF treatment and psychological counseling, and painstakingly moved their homes to places where they could not see power lines. Until 1999, the total cost to society of fear of EMFs in the United States over the past two decades, more than $25 billion.
The raging civil controversy needs an authoritative statement now. The U.S. National Academy of Sciences in 1996 published the conclusions of its three-year study: there is no evidence that low-frequency electromagnetic fields are harmful to human health. But how to explain the higher risk of leukemia in children living near power lines? Scientists answered that it could be that families living near power lines were poorer and more crowded, as well as paying less attention to hygiene, all of which are risk factors for leukemia. Then in 1997, the U.S. National Cancer Institute announced the results of its seven-year study involving 1,200 people: any association between leukemia and electromagnetic fields from power lines was too weak to be detected and not cause for concern. This rigorous and authoritative report, electromagnetic radiation to open a variety of social problems "Pandora's" box finally "fierce closed".
Reflection under the palpitations
The dispute over the harmlessness of electromagnetic radiation is not so much a real crisis of environmental health as a methodological dispute over the design of scientific research programs. When we understand the experimental protocols used by scientists to study the relationship between electromagnetic radiation and health, many of our doubts are cleared up. Based on humanity, scientific research is not possible like the use of experimental mice to put the human body directly in a variety of intensity of magnetic field radiation for experiments, the alternative is epidemiology (investigation and research on the distribution of disease injuries and deaths in the population and the relationship between the environmental factors), biological in vitro cell cultures, conduct of animal experiments, etc., but these three ways have their own pitfalls. For example, in epidemiology, even though statistical surveys show a relationship between electromagnetic fields and carcinogenesis, it is not possible to point out whether the association is causal or not, that is to say, it is not possible to know whether electromagnetic fields cause carcinogenesis. And the conclusions obtained from experiments on cells and animals are sometimes far from the real situation in the human body.
The aforementioned Weihai Mo study of childhood leukemia is a case of statistical misuse, and in fact, the association between leukemia and EMFs is extremely weak, with only a 3% probability, and thus not sufficient to be accepted. On the other hand, if we look at the study between smoking and lung cancer, we will know what happened: firstly, the epidemiological survey showed that the possibility of lung cancer caused by smoking is more than 30%, then the experts found out that the carcinogenic substances in tobacco have a sure mechanism of causing cancer through the in vitro cell cultures, and finally, through the animal experiments to further verify, and confirmed the result that smoking is indeed cancer-causing. And Weihai Mo's study only epidemiological survey, the conclusion reached is not valid.
Life's electromagnetic radiation is actually not terrible. Electricity and magnetism are not man-made fresh products, but naturally occurring, lightning and magnets can also produce electromagnetic radiation. For thousands of years, human beings have been accustomed to living in an electromagnetic field environment, in which light, as an electromagnetic wave, is also closely related to human life, and lightning seems to be an important condition for the birth of life - prompting the synthesis of amino acids hundreds of millions of years ago, completing the most important step in the origin of life! In addition, the Earth itself has a large magnetic field, and flying birds and fish in the water all act with the help of the Earth's magnetic field. Some organisms such as fish can themselves emit strong electromagnetic fields.
In fact, medical science has made a distinction between electromagnetic radiation and energy: high-frequency radiation is harmful, and can interrupt the chemical bonds of human cell molecules, such as X-rays; while radio and home appliances produce low-frequency radiation below a few thousand hertz, which is not only harmless, but can even have a healthy effect on the human body.
The Radical Effects of Electromagnetic Radiation
While scientists have been exploring the dangers of electromagnetic radiation, some of the findings have been surprising. In 1976 and 1979, two Harvard neighborhood clinics found that low doses of radiation could increase the survival rate of cancer patients by about 30 percent over four years. A study at Tohoku University in Japan also showed that patients who received low doses of radiation had an 84 percent chance of surviving 12 years, compared with a 50 percent chance of surviving nine years for those who did not receive radiation.
In addition, in 1994 in Canada and France, and in 1995 in the United States, had conducted a large-scale study have consistently pointed out that the motor employees not only have no additional cancer risk, and even lower than the average rate of people away from electromagnetic radiation.
A more convincing fact is that electromagnetic radiation has long been widely used in the treatment of disease, for example, doctors use electromagnetic waves to treat depression and schizophrenia, stroke, brain edema, high blood pressure, Parkinson's disease and other diseases. In this way, electromagnetic radiation is not only not poisonous, but also a good medicine? 16th century Renaissance great pharmacologist Paracelsus said: "All things are poisonous, and the amount of the dose determines whether or not it becomes a poison." Electromagnetic radiation, which makes people wonder, is just such a "poison".
Biological organisms, which have grown up in nature since ancient times, such as in the radiation environment of cosmic rays, have evolved the ability to adapt to low-dose radiation, which is known as the kinetic effect of electromagnetic radiation. This is known as electromagnetic radiation excitation. Prichoff, who has been researching radiation stimulation for more than a decade, has found that low-dose radiation is beneficial to the human body on at least two levels: first, it stimulates the immune system, which constantly searches for and destroys cancer cells; and second, it promotes the repair of DNA. All radiation, even at low doses, can cause harm, but the benefits of the stimulating and excitatory effects it exerts more than compensate for and outweigh the harm it incurs, Prichoff acknowledged.
Repost:
It is well known that litigation is the order of the day in the US and Europe. For those of you in Guangzhou who refuse to believe the scientists' conclusion that "industrial electromagnetic fields are not harmful to human beings" and who cite countless scary "data", may I ask: Can you cite even a single case of a "victim of radiation from a high-voltage transformer substation" in any country of the world who has sued and been compensated for his injuries? Don't scare yourself!
In fact, in the 1990s, U.S. attorneys, who had already beaten U.S. industrial giants in asbestos, smoking, and silicone breast augmentation lawsuits for huge payouts, decided that "high-voltage power lines and power substations" were the next piece of meat, and lawyers across the U.S. set up the "Electromagnetic Fields Cases Evaluation Team" (ERCET), which was echoed in the civilian community by the "Electromagnetic Radiation Injury Coalition". The court hired 16 top scientists, including 6 Nobel Prize winners in physics, pathology, biochemistry, and medicine, to scientifically evaluate all the evidence. The conclusion was: "Industrial electromagnetic fields are not harmful to the health of the population." This is in complete agreement with the findings of the American Academy of Sciences in 1996 and the American Cancer Society in 1997. No matter how much the lawyers are interested, they have to bow their heads in the face of scientific evidence! "Be proud of believing in science, and be ashamed of being ignorant", President Hu said!!!
The scientific community in Europe and the United States has made the conclusion that "industrial electromagnetic fields are harmless", which is very serious. Conclusion published in the United States the most authoritative medical journals "New England Journal of Medicine"; Europe's most authoritative medical journals "British Medical Journal"; and the "United States Supreme Court of California case", No. S045854, August 22, 1996, 32 pages of the judgment, and other documents. The libraries of Guangzhou and other major cities, as well as the libraries of medical schools, have easy access to the original texts of the above treatises by the world's top scientists in various fields, including six Nobel Prize winners. The question is: Do you believe these scientific authorities, or do you believe the rumors?
It would take 15 years. It's already been done: Hundreds of thousands of people in Finland have lived next to high-tension power lines for 20 years and have been found to have a lower cancer rate than those who don't live near them! In 1996, the Finnish government, in order to answer the questions of the Finnish people like you, instructed:
Professor P.K. Verkasolo of the University of Helsinki, Finland, and the Finnish Cancer Society, and other experts *** with all the Finnish people who have lived in the high voltage lines within the range of 500 meters in the past 20 years, 1970-1989, to conduct a thorough census of all the people living in Finland within 500 meters of the high voltage lines one by one. It was found that the cancer rate of the above group was not higher but 2% lower than that of the whole Finnish population, and in particular, the lung cancer rate of the above group was 7% lower than that of the whole Finnish population.
Residents living near high-voltage substations: you really don't have to be afraid. If you want the power station to be located farther away, you may want to say "no harm", but you must know in your heart: "no harm". Don't forget that the "cup of tea" can be really harmful to your body!
Let's learn from an honest scientist: Swedish scientist Ulla M. Forseen, a professor at the University of Karolinska, has suspected for years that electromagnetic radiation from high-voltage power lines and substations can cause breast cancer in women. Her work has been widely cited as evidence that "high voltage lines and substations are harmful". However, a careful study of 20,400 breast cancer patients and 116,000 healthy women in the city of Stockholm over a period of 23 years by his research team showed that electromagnetic radiation had nothing to do with breast cancer. Prof. Forseen said: "We were shocked. We had always thought there was a link, but after repeated examinations, we could not find any, and our previous suspicions were completely disproved." (The paper was recently published in the American Journal of Epidemiology, Vol. 61, No. 3, pp. 250-259, 2005, and was also reported in SCIENCE NEWS, February 26, 2005) You can check it out in your library). It would seem that some of the individual scientists in China quoted by some people should not generalize and quote outdated information from abroad, causing unnecessary panic among the public.
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Mine is also right ..........................
Listen to what others say ..........................