1, radio and television transmission systems, such as TV transmission towers and radio relay stations;
2. Wireless communication transmission systems, such as mobile phone base stations;
3. High-voltage power transmission and transformation systems, such as high-voltage lines and substations;
4. Electrified railways, such as maglev trains;
5, industrial, scientific and medical electromagnetic energy facilities, such as high frequency smelting furnace.
Influence of excessive electromagnetic radiation on human health
A large number of investigations and scientific research show that excessive electromagnetic radiation has great influence on human health:
1. Thermal effect of electromagnetic waves: When a certain amount is absorbed, the human body will have a high-temperature physiological reaction, leading to neurasthenia, leukopenia and other diseases. This is because the water molecules in the human body rub against each other after being radiated by electromagnetic waves, which causes the body to heat up, thus affecting the normal work of internal organs.
2. Non-thermal effect of electromagnetic wave. When electromagnetic wavelength acts on human body for a long time, the temperature of human body will not increase obviously, but there will be changes in heart rate, blood pressure and other physiological reactions such as insomnia, forgetfulness and alopecia. The reason is that there are weak, stable and orderly electromagnetic fields in human organs and tissues. Once disturbed by external electromagnetic radiation, the electromagnetic field of the human body in a balanced state will be destroyed and the human body will be damaged. It is particularly noteworthy that if the human body is exposed to electromagnetic radiation again without repairing the electromagnetic radiation damage in time, the damage degree will continue to accumulate and the harm will be even greater. Therefore, for groups exposed to electromagnetic radiation for a long time, even if the power is very small and the frequency is very low, various lesions may be induced.
The influence of electromagnetic waves on human body is not only related to radiation intensity, frequency, time and environmental factors, but also related to personal physical condition. Generally speaking, it poses a greater threat to high-rise residents, infants, the elderly and the weak.
Some experts in obstetrics and gynecology said that pregnant women are one of the people most affected by electromagnetic radiation. More than 65% of pregnant women who often contact household appliances and mobile phones have experienced dizziness, fatigue, loss of appetite, irritability, anxiety, tension and other adverse reactions. What's more, electromagnetic radiation has a considerable degree of adverse effects on the fetus. According to research, if a mother uses an electric blanket during pregnancy, the probability that a fetus will develop hematologic cancer in the future is seven times that of an ordinary child; If the mother often uses a hair dryer, the chances of the fetus getting hematologic cancer in the future are 2.8 times that of ordinary children.
Children are also very sensitive to electromagnetic radiation. Researchers in Los Angeles, USA, found that when the average electromagnetic wave intensity in children's rooms is greater than 2.68 milligauss, the probability of children suffering from blood tumors is about 48% higher than that of ordinary children. This is mainly because this ultra-strong electromagnetic radiation changes the surface charge of blood cancer cells in a short time, which leads to the inability of antibodies in the body to interact with cancer cells and destroy blood cancer cells, thus increasing the incidence of blood tumors.
In addition, the harm of electromagnetic radiation to the elderly and patients can not be ignored. A large number of medical documents point out that electromagnetic radiation will increase the risk of Alzheimer's disease, and long-term low-frequency electromagnetic radiation may also cause brain tumors and lymphoma.
Experts suggest that the key to stay away from electromagnetic radiation pollution lies in prevention.
Pregnant women should try to avoid touching microwave ovens, electric blankets, televisions, mobile phones and computers during pregnancy; Try not to arrange too many electrical appliances in the rooms of children, the elderly and patients. Household appliances that are prone to electromagnetic waves should not be placed in the center or operated for a long time to minimize the intensity of electromagnetic radiation.