Article by Lixiao
Cell phone signal towers, satellite receiver, high voltage lines… These seemingly produce radiation equipment for children, pregnant women, and the valetudinarian, what can have a health risk? Please attention–
“Forty or fifty metres near my house has two mobile phone signals, excuse me on the health tower impact?” “My house is near the high voltage lines after, because home pregnant women, we all have more careful, don’t know should move?” In Beijing university and other institutions hold jointly “industrial frequency electromagnetic field and human health and safety international conference on, many listeners put forward their questions, and express the different degrees of fears and doubts.
The ionizing radiation damage to human body small or harmless
The Chinese CDC radiation protection and nuclear safety of the first in the ZhuChangShou medicine “ionizing radiation” and “the ionizing radiation” do the clarification.
He said, radiation energy is bigger, illuminate the human body, so that the cause of ionization ionizing radiation, to human body health hazards, including nuclear largest, and everyone always met, such as medical transmission, and alpha, beta rays ray this category. Other radiation due to energy enough to smaller body called the ionization, ionizing radiation. The ionizing radiation again careful classification of words, in the daily life of the meeting have very low frequency and low frequency, intermediate frequency, the high frequency and uhf, etc. Pull a wire or use hair dryers, relatively low frequency; A bit higher, higher is there is TV in the mobile phone, induction cooker, etc.
ZhuChangShou said: “mentioned radiation, we head to have a comprehensive concept, harmful radiation doesn’t refer to all radiation, too. Harmless, the higher the frequency, the shorter the wavelength of the radiation, the greater the energy, could be harmful; the wavelength is long, low frequency or energy relatively low, harm or may be little harmless to the human body.”
In recent years, our country many appeared in the public against nearby cell phone signal phenomenon such as construction of transmission, served as “electromagnetic field analysis, testing and electromagnetic compatibility” the original state power company ministry level key laboratory of the university of north China electric power, electrical and electronic engineering college professor, “CuiXiangShui due to various reasons, often wrong to understand the public” electromagnetic radiation “concept, especially will ‘electromagnetic radiation” and “particle radiation’ (such as” nuclear “) associated with the concept of the scientific meaning, produce the “panic” and misunderstandings, brings a lot of negative social effect.”
He introduces, not the international “electromagnetic radiation” this term, but the “electric field”, “magnetic field” and “electromagnetic field” this more scientific and more precise terms.
Mobile phone signals such as towers cancer risk equivalent to drink coffee, eating pickle
In 2002, the world health organization of the electromagnetic field cancer risk as 2 B class “can cause cancer”, in May this year, the world health organization and cell phone also listed as 2 B type, make many items cancer cell phone users and life in the electromagnetic equipment surrounding residents panicked.
The world health organization research plan, director of the radiation university of California, Los Angeles, professor Leeka Kheifets said i., “English” may have different meaning “this is the words to say, 2 B class representatives have ‘can cause cancer,’ but the relevance of the evidence is not very enough, and Chinese is not divided into degree of ‘may’ a word have very big difference.”
In order to let you know, Kheifets said, more “belong to 2 B type, and pickle, coffee, car tail gas, have caused cancer evidence linked, but not enough.” Such as the world health organization’s research shows that, now effective evidence that power frequency magnetic field is not the risk of breast cancer in women factors.
The international commission on non-ionizing radiation protection Ruediger Matthes vice chairman, said dr scientific conclusion is proof health risks and very low frequency degree of exposure to the connection between the “don’t exist,” or little evidence. Cancer is widely concerns of a problem, but it is not any evidence of adult cancer, to prove that the electromagnetic radiation, electromagnetic contacts, exposure degree and cancer have immediate concern, and “animals in cancer research, the scale of the data is almost a negative mode.”
Living in Beijing changping district chief town couplet platoon villa with the citizens of this year, on April 17, accept the folk environmental protection organization of darfur q natural knowledge of the electromagnetic environment inspection provide social services, test results is the residence of the cell towers near two power density is highest when WeiWa 0.03 per square centimeter, is far lower than the national standard WeiWa 40 per square centimeter.
But these people is not rest assured, they doubt, “towers testing though small, but digital hand authorities have no cell towers, is last 24 hours of radiation, to human body health effects are DuoDa?”
Kheifets said. “in fact, from the towers near, do not necessarily represent high degree of exposure. We play the phone direct to the human brain, exposures to your usual distance than actually base station near more influence, and you nearly the whole body is from base stations have influence, not the brain, because the brain more sensitive, so the real measure of the cell phone radiation health risks, to see first phone call with exposures.”
East China electric power test, a researcher at YangXinCun said, make a electromagnetic field in the safety of the power index limit value, had the practice is selecting that cause cancer to many suspected of the lowest power, the lowest covers all suspicious power value, called safety threshold, then multiplied by a safety coefficient, and finally determined that safety limits. Some power caused cancer evidence of the connection uncertainty, safety limits of the more cautious, coefficient for the final safety limits and the more, less than safety threshold.
“As long as the detected in safety limits the numerical, no matter how much is long exposure, is safe.” YangXinCun cell towers in the harm of doubt said.
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