In recent years, domestic and foreign media have been reporting that electromagnetic radiation is harmful: more than 4 children in Italy suffer from leukemia every year, and experts believe that the cause is serious electromagnetic pollution; A cancer medical foundation in the United States sampled some patients who were injured by electromagnetic radiation. The results showed that the growth rate of cancer cells in people working near high-voltage lines was 24 times faster than that of ordinary people. Of the 2 million children born in China every year, 35, are handicapped children, of whom 25, are mentally handicapped. Some experts believe that electromagnetic radiation is one of the influencing factors.
Is the harm of electromagnetic radiation really so sensational?
In fact, human beings have been living in an electromagnetic environment. The earth itself is a large magnetic field, and both thermal radiation and lightning on its surface can produce electromagnetic radiation. In addition, the sun and other planets also continuously produce electromagnetic radiation from outer space. However, naturally generated electromagnetic radiation is harmless to human body, while artificially generated electromagnetic radiation poses a threat to human body and pollutes the environment.
as early as 168 years ago, Faraday, an Englishman, discovered a wonderful phenomenon: electric field and magnetic field can be generated when current passes through the media, which is later called electromagnetic induction. In the 198s, people used the principle of electromagnetic induction to build the world's first power station. Since then, mankind has strided into the application era of electromagnetic radiation.
From the first global communication in 191 to the large-scale use of mobile communication, as well as the necessary color TV sets and refrigerators, the application of electromagnetic radiation has penetrated into all aspects of human life. While fully enjoying the convenience and comfort brought by electromagnetic radiation, people are increasingly feeling its negative effects. For example, electromagnetic radiation in electromagnetic compatibility has caused navigation system, medical information system, industrial process control system and information transmission system to get out of control, which has interfered with people's listening to radio and television ...
I heard that as long as electrical appliances such as household appliances, electronic equipment and mobile communication equipment are in operation and use, electromagnetic radiation will exist around them. I also heard that electromagnetic radiation can penetrate a variety of substances, including the human body. Therefore, some people compare the pollution caused by electromagnetic radiation of products to "invisible killer" So how much harm will electromagnetic radiation do to human health?
The reporter interviewed Zhao Yufeng, a professor at Beijing Institute of Labor Protection Science.
Professor Zhao said: "Electromagnetic radiation and electromagnetic pollution are two concepts. Although electromagnetic radiation is ubiquitous, electromagnetic pollution will have negative effects on human body only after the electromagnetic radiation exceeds a certain intensity (that is, the limit of safety and health standards), leading to headaches, insomnia, memory decline, blood pressure rising or falling, borderline abnormalities in the heart and other symptoms. If you work in an environment with excessive electromagnetic radiation for a long time, it may seriously cause some people to miscarry, cataracts, and even cause cancer ... "< P > Zhao Yufeng said frankly that although the influence of electromagnetic radiation on people is widespread, it is not terrible. Different people or the same person have different tolerance to electromagnetic radiation at different ages. Even in the environment exceeding the standard, it does not mean that everyone will get sick, so it is unnecessary to be "scared" about electromagnetic radiation. Of course, preventive measures should be taken for the elderly, children, pregnant women or patients with pacemakers, people who are sensitive to electromagnetic radiation and those who have worked in an environment of excessive electromagnetic radiation for a long time.
In view of the electromagnetic radiation generated by contact with electrical products in daily life, which may endanger health, China Consumers Association issued a warning on August 6: electromagnetic radiation must be prevented in life. Experts remind consumers:
● Don't put household appliances too concentrated or often use them together, so as not to expose yourself to the danger of excessive radiation. In particular, televisions, computers and refrigerators should not be concentrated in the bedroom.
● All kinds of household appliances, office equipment, mobile phones, etc. should be avoided for a long time. When electrical appliances, such as televisions and computers, need to be used for a long time, attention should be paid to leaving every hour, and the way of looking into the distance or closing your eyes should be adopted to reduce the fatigue of your eyes and the influence of radiation.
● When the electrical appliances are suspended, it is best not to put them in standby state, because weak electromagnetic fields can be generated at this time, and radiation accumulation will also occur for a long time.
keep a safe distance when using various electrical appliances. For example, the distance between the eyes and the TV screen is generally about 5 times the width of the screen; Leave one meter away after the microwave oven is turned on, and pregnant women and children should stay away from the microwave oven as far as possible; When using the mobile phone, the distance between the head and the antenna of the mobile phone should be as far as possible, and it is best to use separate headphones and microphones to answer the phone.
● People living and working near high-voltage lines, radar stations, TV stations and electromagnetic wave transmission towers, patients wearing pacemakers and people living in modern electrical automation environment, especially pregnant women, children and the elderly with weak resistance, should be equipped with shielding protective clothing to block electromagnetic radiation if possible.
● Electrical equipment with display screens such as televisions and computers can be equipped with electromagnetic radiation protection screens, and users can also wear radiation protection glasses. The radiation generated by the display screen may cause dry skin, accelerate skin aging and even lead to skin cancer, so you should wash your face in time after use.
● The electromagnetic radiation released at the moment when the mobile phone is connected is the largest, so it is best to answer the phone when the mobile phone rings for one or two seconds or when the phone rings twice.
● Eat more foods rich in vitamins A, C and protein, such as carrots, tomatoes, kelp, lean meat and animal liver, so as to strengthen the body's ability to resist electromagnetic radiation.
"Actually, it is not a new question whether electromagnetic radiation has an impact on human health." Li Tianlin, a researcher at the Chinese Academy of Preventive Medicine, told the reporter, "Experts and scholars at home and abroad have been studying and commenting on electromagnetic radiation for half a century. However, due to the inconsistency of research objectives, methods and conditions (different distances, time and biological models of exposure to electromagnetic radiation sources), the research results and opinions of relevant experts and scholars around the world on the biological effects of electromagnetic radiation are not consistent at present. Therefore, what impact and harm electromagnetic radiation has on the human body needs further discussion. "
However, Li Tianlin believes that, as a big country, China's relevant authorities should formulate a national unified compulsory national standard for electromagnetic radiation safety and health as soon as possible. So that production enterprises can follow this standard to research and develop ultra-low electromagnetic radiation electrical appliances and equipment to ensure the safety of consumers. At the same time, the management of electromagnetic radiation will be included in the normal social environmental protection scope, effectively protecting the legitimate rights and interests of consumers and workers.
The reporter interviewed several relevant departments on the issue of formulating electromagnetic radiation standards, and learned that in the past, the Ministry of Health, the Ministry of Electronics Industry (now merged into the Ministry of Information Industry), the State Environmental Protection Administration, the military and other departments all formulated their own electromagnetic radiation safety standards, but there was no unified compulsory national standard for electromagnetic radiation safety. It is reported that at present, China is working on formulating mandatory national standards for electromagnetic radiation, which is expected to be introduced before the end of this year.
According to experts from the State Environmental Protection Administration, the electromagnetic radiation environment in China is relatively good at present, which is equivalent to the situation of water pollution and air pollution faced by China in the 195s and 196s. There are signs of emergence, far from being serious. But from now on, we must strictly manage and plan ahead. Because social and economic development is inseparable from the application of electromagnetic radiation. If the electromagnetic pollution is unbearable to the environment, it will be difficult to further develop the economy.