The International Health Organization (WHO) has confirmed that the power frequency electromagnetic field generated by high voltage transmission is a suspected carcinogen to human beings. A large number of studies have also proved the correlation between power frequency electromagnetic field and other human diseases (such as nervous system diseases). Residents, especially children and the elderly, are more sensitive to power frequency electromagnetic fields and more vulnerable. Scientific research also shows that the probability of people suffering from leukemia and cancer within 40-300 meters around 220 kV high-voltage lines is several times that of other regions. Electromagnetic radiation can also lead to miscarriage of pregnant women, fetal malformation and cardiovascular diseases, which is extremely harmful to people. High-voltage tower diameter 1.6 km, for children and pregnant women. The proportion of deformed children is four times (compared with the proportion that does not live under high voltage). The impact within 300 meters is very serious, which will lead to the increase of cancer, leukemia and childhood leukemia several times. It is a problem that cannot be ignored.
2. The harm of high-voltage line radiation to human body can not be ignored. 1979 Dr. Walter HAMA of the United States pointed out that the incidence of leukemia and cancer in infants born near high-voltage power lines and substations is 2.98 times higher than that in normal people. 1992, Switzerland conducted a medical survey for 1 ~ 25 years on 500,000 residents living within 500 meters along 200KV-400KV high-voltage transmission lines. It is found that the occurrence of tumors, especially childhood leukemia, is directly related to high-voltage electromagnetic fields.
1993, scientists from Karolinska University in Stockholm, Sweden published the survey results of 430,000 residents living near high-voltage lines for a long time, clearly pointing out that high-voltage electromagnetic fields are directly related to cancer, especially brain tumors and childhood leukemia. Therefore, in June of 20001year, the International Agency for Research on Cancer (IARC) under the World Health Organization listed the power frequency electromagnetic field (that is, the electromagnetic field generated by transmission lines and equipment) as a suspected carcinogen (classification number 2B). In order to reduce the harm of electromagnetic radiation to human body, Sweden's National Radiation Association suggests that cables should be set as far away from cities and villages as possible to avoid electromagnetic radiation. The National Radiological Protection Assessment Conference (NCRP) stipulates that high-voltage lines are not allowed to be erected near buildings such as schools, kindergartens, houses and office buildings.
Studies in Poland have found that workers who work within 50 meters of 400,000-volt high-voltage power lines are much more likely to suffer from physical and mental diseases including schizophrenia, depression and even suicide than ordinary people. The research report with12,000 people also found that residents living in the range of1/kloc-0 to 400,000 volts are 4.7 times more likely to suffer from depression than ordinary people. In terms of the impact on pregnant women, French researchers found that within the range of 500,000 volts of high-voltage power lines, the probability of fetal malformation and mutation in pregnant women increased by 25%, especially in the heart and bones. If the deformity is too serious, it will easily lead to miscarriage.
3. In terms of the incidence of cancer, employees who often work under high electromagnetic waves are more likely to suffer from brain tumors and blood tumors. The health department of our country has also studied the data of 28 children who died of hematological tumors, and found that the probability of children under 14 living within 100 meters from high-voltage power lines is 2.5 times that of children of the same age living outside 100 meters. The National Academy of Sciences found that children living near high-voltage power lines have a 50% increase in the incidence of blood cancer.
For 638 children with lymphoma or hematological tumors, the United States installed 24-hour electromagnetic wave detection instruments in their bedrooms, measuring 1 time every 30 seconds. The results show that if the average intensity of electromagnetic waves is greater than 2 milligauss, the probability of children suffering from lymphoma or blood cancer increases by 50%, and if it is greater than 3 milligauss, the probability of suffering from lymphoma or blood cancer increases by 70%. In another epidemiological survey, it was found that workers working within 300 meters of high-voltage power lines were exposed to electromagnetic waves of more than 20 milligauss, and the probability of suffering from blood tumors was 3.7 times higher than that of ordinary people.
In the study of breast cancer, the Swiss area conducted a study on the households within the range of high-voltage power line (voltage between 220,000 and 400,000 volts) 100 meter, and found that the probability of breast cancer increased by 7.4 times. The National Radiation Protection Committee of the United Kingdom believes that the electromagnetic radiation intensity of high-voltage lines reaching or exceeding 132 kV exceeds 0.4 microtesla within tens of meters; 1 1-66 kV high-voltage lines have an electromagnetic radiation intensity exceeding 0.4 microtesla within a range of more than ten meters; However, the electromagnetic radiation intensity of high-voltage lines buried underground is only more than 0.4 micro-Tesla within a few meters.
The Swedish National Committee for Industrial and Technological Development selected the areas along the line under the 220-400 kV high-voltage power grid for investigation, and found that there were indeed 500,000 people living within 300 meters of the power line between 1960 and 1985. According to statistics, children below 15 are ordinary leukemia children if they are exposed to an environment with an average magnetic induction intensity greater than 0.2 microtesla.