When the hot summer comes, the first thing we feel is hot; windy and rainy, we will see lightning and thunder; clear skies, you will see the radiant sun. Heat, lightning, sunshine, is a kind of electromagnetic radiation in nature, but the energy of this radiation is very low, and generally does not cause harm to the human body. Nowadays, with the rapid development and wide application of electronic technology, the radiation pollution brought about, has far exceeded the level of natural radiation.
So what equipment will have radiation? The State Environmental Protection Administration has included five categories of equipment in the implementation of strict review and supervision of the scope: First, transmitting equipment, such as radio and television transmission towers; Second, communication facilities, such as radar, mobile communication towers; Third, industrial, medical, scientific research with high-frequency equipment; such as thermal laminating machines, physiotherapy machines; Fourth, transportation equipment, such as electrified railways, light rail trolley buses; and Fifth, electric power equipment, such as high-voltage power transmission lines, etc..
According to expert testimony, in modern society, a variety of radio stations and industrial, scientific, medical and household appliances are maintained at more than 20% annual growth rate, when these modernized facilities to benefit mankind at the same time, but also to make people suffer from the harm of electromagnetic radiation pollution.
In fact, electromagnetic radiation pollution has been recognized as the world's radioactive pollution, water pollution, air pollution, noise pollution, one of the major sources of pollution. The United Nations Conference on the Human Environment has been listed as one of the environmental protection program. On May 6 this year, the State Environmental Protection Administration in the "national electromagnetic radiation environmental pollution survey report" that: electromagnetic radiation environmental pollution does exist, the State has formulated the electromagnetic radiation environmental protection countermeasures, and requires the key sources of electromagnetic radiation environmental pollution to carry out environmental impact assessment.
Based on the damage caused by electromagnetic radiation on the human body, the State Environmental Protection Administration decided to increase the management of electromagnetic radiation, and electromagnetic radiation environmental pollution management into the normal work schedule. Experts have confirmed that under electromagnetic radiation, headaches, allergies, insomnia, chest pain, eye damage, neurasthenia; anemia, sexual dysfunction and other disorders, with the increase in the intensity of radiation, but also cause cellular aging, inhibit the body's immune system, which can cause genetic mutations and chromosomal aberrations, prompting the activation of viruses or the release of the virus to the point of causing cancer. Of course, its severity depends on the type, intensity and speed of the radiation, even if the tissue degeneration and cancerous, but also accumulated for many years before the reaction, once found, it is difficult to treat.
The most direct harm to human and biological muscle is high-frequency electromagnetic microwave radiation, because it can penetrate the surface layer of the organism and direct heating of internal tissues, and the internal tissues of the organism is difficult to dissipate heat, often the surface of the muscle is nothing, while the internal tissues are severely burned, we usually know the microwave oven heating is the principle of a typical example can be corroborated, a few years ago, in the scenic Emei mountain A microwave pollution incident occurred, in the slope facing the microwave transmitter station, due to long-term exposure to radiation, pines and other natural vegetation all withered and died, while on the other side of the mountain, the vegetation is lush and green.
Research by scientists in the United States and Australia has also proved that microwave radiation generated by cell phones can cause damage to physiological functions. As a result, these two countries have banned the erection of transmitting antennas near schools and residential areas.
Something similar has happened in our country. In Guangzhou and Shenzhen, there have been a number of accidents in which airplane equipment has been out of order due to serious interference with satellite navigation systems caused by electromagnetic waves emitted by mobile communication equipment near airports. In some occasions to play the cell phone, but also can cause electrical locomotive derailment, so that some medical equipment such as cardiac pacemaker malfunction. Some National People's Congress deputies called on the country to legislate as soon as possible to clean up the electromagnetic public nuisance.
Beijing mobile communication base stations become the main source of electromagnetic radiation pollution
Because of the fear of electromagnetic radiation close at hand in the mobile communication base stations jeopardize their own safety, Fengtai District, Beijing, Shijuanzhuang top of the XiuXinYuan residents have repeatedly found the relevant departments to request the removal of the base station. The top of the Xiu Xinyuan residents of the community's concerns are not unfounded, the Beijing Radiation Environment Management Center data show that the mobile communications base stations and television transmission towers, broadcasting stations, high-voltage transmission and substation systems, etc. *** with the main source of electromagnetic radiation pollution in Beijing.
On March 19, 2005, Beijing Unicom opened 152 GSM network base stations in just two hours. Following the network coverage rate of 99.99% in the eight districts of the city, the number of base stations and repeater stations in the suburbs of Beijing Mobile has grown to more than 2,000 as of May 2005. At present, the number of SmarTone base stations in Beijing also exceeds 16,000, while according to the plan, the number of SmarTone base stations will reach more than 20,000.
Aiming at the problem of electromagnetic radiation of mobile base stations in Beijing, the relevant experts of Beijing Municipal Environmental Protection Bureau said that in addition to the strict compliance with the State Environmental Protection Administration's "Regulations on Protection against Electromagnetic Radiation" and other relevant national laws and regulations, Beijing officially implemented the "Regulations on Environmental Protection Management of Mobile Communication Construction Projects in Beijing" (for trial use) on April 1, 2000, which made detailed regulations on the construction and use of mobile communication base stations. The regulations require that: mobile communication stations (including mobile telecommunication stations) are to be used for the construction of mobile telecommunication base stations. The regulations require that: the electromagnetic radiation level of the proposed location and the surrounding environment should be monitored before the construction of the mobile communication station (station), and no mobile communication station (station) shall be constructed where the power density of its public exposure export limit is greater than 40 μW/cm2; the minimum permissible height of the outdoor antenna of the cellular mobile communication base station shall be determined by the approved Environmental Impact Approval Sheet, but it shall not be less than 25 meters in general; in the area where the high volume of voice traffic The minimum permissible height of the outdoor antenna of the base station constructed in a densely populated area shall not be less than 16 meters; when the outdoor antenna of the cellular mobile telecommunication station is installed on a sensitive building, the antenna shall be installed in the center of the roof of the building or on the top of the elevator room of a high-rise building, and the distance between the antenna and the roof of the building shall not be less than 2.5 meters. As long as the above laws and regulations are strictly adhered to, electromagnetic radiation from mobile communication base stations will not jeopardize human health.
Beijing Radiation Environment Management Center experts suggest that mobile communication enterprises should pay attention to the following matters when choosing the address of the base station: try to avoid building stations in the most sensitive areas such as kindergartens, schools, hospitals and the elderly; seriously comply with the "Beijing Mobile Communication Construction Project Environmental Protection Management Provisions" (Trial) in the content of the provisions of the erection of the location of the most reasonable, and give due consideration to the psychological tolerance of the residents; take the initiative to fulfill the environmental protection of the environmental protection of the construction project (Trial). psychological tolerance of the residents; take the initiative to fulfill the environmental protection procedures, and timely release the environmental protection monitoring data to the public, so as to dispel people's ideological concerns, and at the same time, help the construction unit to protect its legitimate rights and interests in accordance with the law; enjoy the resources **** and minimize the duplication of the construction of the base stations; strengthen the research and publicity and explanation of the relevant aspects of electromagnetic radiation, respect the public's right to know, and set up an effective system of public information and communication, and Strictly implement existing electromagnetic radiation protection standards and regulate the construction of facilities accompanied by electromagnetic radiation generation in order to obtain public understanding and support.
Even so, Prof. Zhao Yufeng of the Indoor Environment Monitoring Working Committee of the China Interior Decoration Association reminded residents not to take the electromagnetic radiation around them lightly. Prof. Zhao Yufeng said: radiation intensity close to the standard, not exceeding the standard does not mean harmless.
Although from the current mobile base station monitoring situation, a single base station rarely exceeds the national standard, and most of them are far below the national standard, but if the same area of the base station built more, the power is too large, the intensity of electromagnetic radiation in the region or the possibility of exceeding the standard. Coupled with the impact of high-voltage lines, TV towers and other small areas, as well as home furnishing materials and electrical factors, in fact, many residents at home the intensity of electromagnetic radiation has far exceeded the national standard. And because the general environment of electromagnetic waves on people is a long-term effect, the research on it is also a long process. On the results of the current study, how much radiation on the body will constitute a hazard is still difficult to draw conclusions. Insiders emphasize that the degree of influence of electromagnetic waves on the human body in addition to radiation intensity, frequency, time, environmental factors, etc., but also with the individual's physical condition. In addition to the elderly, children, pregnant women and other people sensitive to electromagnetic radiation, different people or the same person at different ages on the tolerance of electromagnetic radiation is not the same. Therefore, the radiation protection standard is only a relatively safe range.