(1) from radio transmitters, such as radio, television transmitters, radar systems, etc..
(2) From industrial frequency strong electrical systems, such as high-voltage transmission lines, substations and so on.
(3) from the application of electromagnetic energy industrial, medical and scientific research equipment, such as electronic instruments, medical equipment, laser photographic equipment and office automation equipment.
(4) From people's daily use of household appliances, such as microwave ovens, refrigerators, air conditioners, electric blankets, televisions, video recorders, computers, cell phones and so on.
Harm of electromagnetic radiation:
Electromagnetic radiation, although colorless, tasteless, invisible, but can penetrate a variety of substances, including the human body, the greater the energy of electromagnetic radiation on the human body has a greater impact, such as causing headaches, palpitations, insomnia, memory loss, leukocyte reduction, decreased visual acuity, and even affect children's development. According to China's eugenics association statistics show that the country's annual birth of more than 200O million newborns, close to 1.2 million for the defective children, experts pointed out that the factors leading to infant defects, electromagnetic radiation is the most harmful. Another study results show that the electromagnetic waves generated by microwave ovens may induce cataracts, leading to brain abnormalities, and even reduce fertility.
According to the World Health Organization, the International Commission on Non-Ionizing Radiation Protection (ICNIRP) and other authoritative departments to provide detailed data, the financial and securities industry, broadcasting and television industry, IT industry, the electric power industry, the communications industry, civil aviation, railroads, the use of high-frequency physiotherapy equipment in the medical industry, the large number of instrumentation used in scientific research industry, the use of microwave electrical equipment, the industry, the modernization of the Office of the popularity of equipment Industry, with computers and cell phones and other modern tools of life, such as human beings are recognized as the existence of electromagnetic radiation of high-risk groups.
See, electromagnetic radiation called "invisible killer" is more than ever.
Protection of electromagnetic radiation:
The hazards of electromagnetic radiation and protection work has caused the world's countries attach great importance. The United Nations Conference on the Human Environment had explicitly requested governments to strengthen the prevention and control of electromagnetic radiation pollution. China has decided since January 1, 1999, on computers, monitors, printers, switching power supplies, televisions, stereos, six kinds of imported goods to implement the mandatory testing of electromagnetic compatibility, the unqualified products are rejected outside the country. The State Economic and Trade Commission and the China Consumers Association has long emphasized the need to protect against electromagnetic radiation! At present, the main measures to prevent electromagnetic radiation are generally the following.
1, distance protection
According to the electromagnetic field strength in the propagation process with the increase in distance and the principle of weakening, can be taken away from the source of radiation, so that the workplace is located in the place of the minimum intensity of radiation, to avoid working close to the source of radiation right in front of the work or stay. For example, when a cell phone is connected or dialed out, the cell phone should be as far away from the body as possible, and the human body and the cell phone antenna should be kept at a certain distance during the call.
2, shielding protection and personal protection combined
In the case of can not be far away from the electronic products and electromagnetic radiation environment, people can use effective methods to limit the electromagnetic energy in the prescribed space, to prevent the spread of its diffusion; on the other hand, people can also wear special protective clothing, hats and glasses, to strengthen their internal organs system, the genitourinary system and the eyes for Protection. At present, the world's experts have developed a large number of electromagnetic protection products, such as protective wallpaper, protective transparent film, shielding clothing, protective glasses, "fetal protection treasure" apron, cell phone radiation screen, computer monitor protective screen, computer electromagnetic radiation shield, etc. These products can play a very good protective effect.
3, strengthen the exercise and reasonable diet
Strengthen the exercise, enhance physical fitness, can improve their immune system. In addition, usually drink more green tea, eat more food rich in vitamin B, such as carrots, kelp, rape, cabbage and animal liver, etc., is also conducive to regulating the human body electromagnetic field disorders, increase the body's ability to resist electromagnetic radiation pollution.
It is true that electromagnetic radiation can cause discomfort and may even produce serious harm to the human body, but it does not mean that as long as there is electromagnetic radiation, people will be in big trouble. In fact, in today's society, we all live in the electromagnetic radiation, such as telephone, watching TV will be subject to a certain electromagnetic radiation. Therefore, we do not want to choke, talk about radiation color change, as long as the correct understanding and do a good job of adequate protection measures, electromagnetic radiation can be reduced to the minimum extent that the human body can withstand, people can fully enjoy the convenience of modern science and technology, but also to maintain a healthy body and a happy mood, the fish and the bear's paw at the same time, why not do it.