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Electromagnetic radiation pollution in life and its prevention

Today, we work and live in the e era. When you enjoy the convenience and comfort brought by science and technology every day, have you ever thought that electromagnetic waves of different frequencies unconsciously form an invisible, inaudible, inaudible and intangible dense pollution source "electronic fog" around us, which penetrates and "cuts" people's bodies at will, just like ghosts? There are many kinds of electronic products in life, which are closely related to our life and work, and we have been in contact for a long time. Therefore, the influence of electromagnetic radiation produced by these electronic products on human health has been paid more and more attention. So, what is electromagnetic radiation pollution? What is its mechanism of action on human body? How to prevent electromagnetic radiation pollution?

Electromagnetic radiation pollution; Mechanism of electromagnetic radiation pollution; Prevention and control of electromagnetic radiation pollution

183 1 year, the British scientist Faraday used the method of electromagnetic induction to make the conductor in the magnetic field generate induced current under certain conditions. This is one of the greatest discoveries in the19th century, and then the completion of the first power station in the world marks that mankind has entered the application era of electromagnetic radiation. More than a hundred years ago, electromagnetic radiation has penetrated into all aspects of human life, and now it has entered the era of high utilization of electromagnetic radiation. However, science has always been a double-edged sword, and the progress of the times often comes at a price. This antinomy phenomenon has been verified many times in history. While people fully enjoy the convenience and comfort brought by electromagnetic radiation, they also increasingly feel its negative effects. For example, all kinds of office automation equipment, mobile communication equipment and household appliances quickly entered our lives, which improved our work efficiency and enriched our spiritual and material life. While our life is more convenient than ever, the electromagnetic radiation produced by the high-tech products we use has become another indoor environmental pollution after indoor air pollution, radioactive pollution and noise pollution. Especially in recent years, domestic and foreign media have repeatedly reported the harm of electromagnetic radiation to human body, which makes people feel the threat from electromagnetic radiation, so that many people have a sense of disgust and fear when they mention it.

1 electromagnetic radiation pollution: the so-called electromagnetic radiation pollution refers to electromagnetic waves with different wavelengths and frequencies generated by high-voltage electricity, substations, radio stations, television stations, radar stations, electromagnetic wave towers, electronic instruments, medical equipment, automation equipment, microwave ovens, radios, televisions, computers, mobile phones, etc. If the human body is exposed to electromagnetic radiation that exceeds the safe electromagnetic radiation dose for a long time, cells will be killed or killed. With the continuous enrichment of information technology products, electromagnetic radiation pollution has become one of the important types of radiation pollution that endanger people's work and life. On the other hand, information technology depends on electromagnetic waves, which are easily disturbed and destroyed, bringing some junk information and harmful information, which is also an aspect of electromagnetic radiation pollution. Electromagnetic radiation will cause so-called "electromagnetic pollution", also known as electronic "smoke" or electronic waste, that is, the intensity of electromagnetic radiation exceeds the limit that human body or environment can bear. It is colorless, tasteless, invisible, traceless and insensitive. It can penetrate many substances, including the human body, and it is everywhere. Scientists call it "electronic waste" or "electronic radiation pollution", and some experts call it the fourth kind of pollution after air pollution, water pollution and noise pollution.

2 Mechanism of electromagnetic radiation on human body

The human body is a conductor and can absorb the energy of electromagnetic field. Under the action of electromagnetic field, the molecules of human body will be arranged. In the process of molecular arrangement, they collide with each other to consume magnetic field energy and convert it into internal energy, resulting in thermal effect. The greater the intensity of electromagnetic field, the more obvious the thermal effect; The higher the frequency of electromagnetic oscillation, the more obvious the thermal effect, that is, the effect of electromagnetic radiation on human body: microwave >; Ultrashort wave > short wave > Zhong Bo > long wave, but it will also interfere with the transmission of human bioelectrical signals. Scientific experiments show that the harm of electromagnetic radiation pollution to human body mainly lies in two aspects-thermal effect and non-thermal effect. Thermal effect thermal effect means that electromagnetic waves penetrate the surface of organisms and directly "heat" the internal tissues of organisms (just like microwave ovens heating food), that is, the temperature of substances will change under the action of high-frequency electromagnetic waves. The thermal effect of high-frequency electromagnetic waves will affect organisms, thus causing serious harm to human body, leading to breast adenocarcinoma, impotence, abortion, fetal malformation and other diseases. Non-pyrogen effect Non-pyrogen effect mainly refers to the damage of electromagnetic waves to the autonomic nervous system of human body, causing palpitation, alopecia, bradycardia, blood pressure reduction, menstrual disorder of women and other diseases. A typical experiment is to extract from the cerebral cortex of chickens and cats and irradiate them with modulated UHF and UHF electromagnetic waves, and calcium ions are found to precipitate. Calcium ion is an indispensable substance for information transmission, immune system work and cell reproduction in organisms, and its concentration change will inevitably have an impact on organisms.

3 Preventing electromagnetic radiation pollution in life Modern life is inseparable from dealing with electronic equipment. Pollution sources that can produce electromagnetic radiation pollution are everywhere, such as computers, printers, photocopiers, mobile phones, radio instruments and so on. Both produce electromagnetic radiation waves harmful to the body; Various electromagnetic interferences related to daily life, such as televisions, stereos, washing machines, refrigerators, air conditioners and microwave ovens, will be generated. How can we protect them? How to prevent and reduce indoor electromagnetic radiation pollution in life? Experts from the Indoor Environment Monitoring Center of China Interior Decoration Association remind everyone to pay attention to the following points: when purchasing electronic products, we should pay attention to confirm whether the products have passed CCC certification (National Safety Certification for Electronic Electromagnetic Compatibility); Minimize the use of high-radiation products; Try to use low-radiation products, such as low-radiation TV sets, microwave ovens, computers, etc. Try to make phone calls by plane, and use fewer mobile phones. The electromagnetic radiation released at the moment when the mobile phone is connected is the largest, so it is best to answer it after a second or two of ringing or between ringing. When using, the distance between the head and the antenna of the mobile phone should be as far as possible. It has been said that if you don't buy household appliances or put them on the shelf and don't use them anymore, pollution will not exist or be reduced. Good is good, but without them, our life will go back to the hard times of the past. I'm afraid no one wants to give up a good life and live a hard life. Learning more preventive measures is a realistic and feasible policy. For example, don't put home appliances too concentrated, so as not to expose yourself to the danger of excessive radiation. In particular, some household appliances, such as televisions, computers, refrigerators, radios and so on, which are prone to generate electromagnetic waves. It is best not to put it in the bedroom. Avoid using household appliances and mobile phones for a long time, and try to avoid enabling multiple household appliances at the same time. It is necessary to keep a safe distance from home appliances. The farther the distance, the smaller the electromagnetic wave. The safe distance of color TV is about 5 times the width of fluorescent screen, and that of fluorescent lamp is 2 ~ 3 meters. After the microwave oven is turned on, it should be at least 1 meter away, and pregnant women and children should stay away from the microwave oven as far as possible. When the electrical appliance is suspended, it is best not to let it stand by, because at this time, a weak electromagnetic field will be generated and radiation will accumulate for a long time. Another trick is to eat. Eat foods rich in vitamins A, C and protein, such as carrots, bean sprouts, tomatoes, rape, kelp, Chinese cabbage, lean meat, animal liver, etc., to strengthen the body's ability to resist electromagnetic radiation. People who live and work near high-voltage lines, radar stations, TV stations and electromagnetic wave towers all wear hearts.

If conditions permit, pacemakers should be equipped with shielding protective clothing to block electromagnetic radiation. 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 wash your face in time after use. Environmental pollution index of electromagnetic radiation between injections. Relevant experts reminded that five kinds of people should pay special attention to this article.

First of all, people who live and work near high-voltage lines, substations, radio stations, TV stations, radar stations and electromagnetic transmission towers; Second, people who often use electronic instruments, medical equipment and office automation equipment; The third is the employees living in the modern electrical automation environment; The fourth type is patients wearing pacemakers; Fifth, pregnant women, children, the elderly and patients living in the above environment should know the degree of indoor electromagnetic radiation pollution. If the electromagnetic radiation pollution in the environment is relatively high, corresponding measures must be taken. Electromagnetic radiation, another modern pollution in the E era, has been listed as one of the main pollutants causing public hazards by the United Nations Human Environment Conference. Remember? In our children's songs, the high-voltage line with several small sparrows was once compared to a staff, which was once the most beautiful picture in the city. Times have changed, but now, because of the suspicion that the electromagnetic radiation released by high-voltage lines around residential areas will endanger human health, the builders of high-voltage lines have repeatedly appeared in hearings and even courts, and disputes have intensified. Some experts say that human understanding of the world is a gradual process, and many problems need further scientific research and time test. At present, no matter how fierce the academic debate is, the problems that cause great controversy should be solved in time. First of all, product standards directly related to public health should be introduced in time.

The second is to strengthen the supervision of existing standard products, especially those listed in the 3C certification catalogue.

Third, formulate relevant laws and regulations to solve current disputes in a timely manner. Of course, for us ordinary people, we should also change our lifestyle appropriately. For example, spend as much time as possible outdoors, go to the countryside, go to the fields, get close to nature and enjoy it.

References [1] Universe, Earth and Atmosphere [America]. Asimov, Science Press. [2] Zhu Jianqing, author of electromagnetic wave engineering. National University of Defense Technology Press.