When the electromagnetic radiation intensity of the human environment exceeds a certain limit, it will certainly have adverse effects on human health. Light, will lead to human nervous dysfunction, dizziness and brain swelling, insomnia and dreams, fatigue and weakness, memory loss, palpitation and other symptoms of neurasthenia. Heavy, will increase the risk of cancer, and may cause pregnant women abdominal embryo dysplasia, abortion rate, the incidence of teratogenesis increased. Since electromagnetic radiation may cause harm to human body, the United Nations Conference on the Human Environment has already listed it as one of the major pollution causing public hazards. In hospitals, people who are often exposed to strong radiation, such as the staff of the imaging department of hospitals, can enjoy a paid "radiation holiday" for one month every year because of their exposure to CT and MRI. The purpose is to minimize their exposure to radiation and avoid its harm.
不过日常生活中，我们接触的 It’s not CT and MRI that are gun radiation instruments, but ordinary electrical appliances. They don’t produce excessive electromagnetic radiation and do harm to the human body? The mainstream view in the scientific circle is that they don’t. On the one hand, every ordinary electrical appliances are strictly tested to ensure that the radiation produced is very small and safe to the human body; on the other hand, a large number of clinical studies also acknowledge that they do not produce excessive electromagnetic radiation and do harm to the human body. For example, everyday electrical appliances do not cause damage to the human body. However, although the radiation produced by daily electrical appliances is not large, if there are many electrical appliances such as photocopiers, computers, printers and so on in the office at the same time, the radiation may not be safe at this time.
