Influence of radiation from mobile signal tower on human health

At present, science cannot explain the relationship between long-term radiation exposure and cancer, nor can it provide relevant evidence. It is clear that the maximum power emitted by the antenna of the mobile signal transmitting station (base station) is 20 watts, and the emission frequency is 900 MHz (or 1800 MHz), which is generally in the order of milliwatts when reaching the human body; The maximum transmitting power of a mobile phone is 2 watts. When talking on a mobile phone, the radiation will be much greater than that of a base station. There is radiation, but within the scope of national safety standards, it will not have any adverse effects on human body. The transmission towers of communication facilities are all approved by the local environmental protection bureau, and the power is very small, below 200mW, which is basically harmless to people. Experts say that although the term electromagnetic radiation pollution is a bit strange, it is very common in our lives. Pollution sources that can cause electromagnetic radiation pollution are everywhere, such as TV towers, radar stations, communication transmitters, substations, high-voltage lines, computers, mobile phones, microwave ovens, induction cookers, and even the subway trains we take. Experts tell us that some cities have TV towers, because the TV towers are hundreds of meters high, and the radiation area has exceeded the height of residential buildings, which will basically not affect the health of citizens. Some high-rise buildings have installed antennas, such as parabolic antennas, mobile phone base stations, paging station antennas, etc. These antennas have limited power and are controlled by the local radio management Committee, which has little impact on residents. China Unicom, China Mobile, China Telecom and other signal transmission towers. The height of signal transmission towers is generally more than 45 meters, while the height of ordinary residential buildings is 7 floors, which is about 2 1 meter. The antenna height of the iron tower is much higher than that of the existing residence, which will not cause harm to people's health. European and American countries have conducted a large number of surveys and statistical analysis, and the scale of each survey is different. There are thousands, tens of thousands, hundreds of thousands or even millions of people in a survey. The investigation site is in the wild, such as power lines, substations, subway stations and electric trains; Or in factories, laboratories, offices and homes. The investigation spans more than ten years or even decades. A large number of survey results convincingly show that the occurrence probability of various tumor lesions in human body is closely related to low-frequency magnetic field radiation. Experts in many countries in Europe and America and some government agencies are convinced that low-frequency magnetic fields will significantly increase the incidence of the following diseases: leukocytosis and leukemia (especially more harmful to children), cancer, physical defects of newborns, breast cancer, brain tumors, malignant lymphoma, nervous system tumors, astrocyte development, chronic myeloid leukemia, chromosome aberration and so on. It has also been reported that the decreased secretion of some hormones under the electromagnetic field may also be the cause of breast tumors. Some investigation reports also pointed out that people who are exposed to electromagnetic radiation frequently have a greater risk of breast cancer if they are exposed to high temperature again. There must be an impact, but the impact is not big. We solved the problem by calculation. If you care about the results and don't care about the calculation process, just look at the first half of the simple explanation: first, we calculate the radiation energy near a base station; Secondly, it is proved that with the increase of the distance from the base station, the radiation energy will decrease at the rate of the square of this multiple. Finally, the harmless conclusion is the first step of calculation. What is the radiation energy per square meter from the base station 10 meter (transmission power 10 watt)? Through the calculation formula of sphere, we know that the surface area of a sphere with a radius of 10 m is 4 * Pi * 10 2. For the convenience of display, operators and operation rules in computer language are used here, where PI is pi, and the surface area of a sphere with radius of 100 m is calculated to be greater than 1200 square meters and 10. What is the concept of this energy? The emission power of the most "environmentally friendly" PHS has reached 400 MW per square meter, which should be quite safe. You know, the power of an ordinary light bulb must reach 60 watts, while the power of a TV set is as high as 300 watts, so people rarely use it outside its 10 meter. Secondly, prove in the second step. Through the surface area calculation formula, we can see that the surface area of the ball increases with the increase of radius, that is to say, with the increase of distance, the same radiation energy should be shared in a larger area, which is the square times of distance. Naturally, the energy per unit area will decrease inversely with the square of the distance. That is to say, 20 meters away from the base station, the radiation received is a quarter of 10 meters and a ninth of 30 meters. So as long as you don't lean your head against the base station, this thing should still be quite safe.