The second is the harm of cosmic radiation. Cosmic radiation intensity increases with altitude and latitude. Modern jet airliners in 10 to 20 kilometers flight altitude, the intensity of cosmic radiation is nearly 100 times the sea level, long-term exposure to cosmic radiation, some indicators reflecting radiation damage (such as the body's lymphocyte micronucleus rate) changes, indicating that health has been affected.
Third is the harm of electromagnetic radiation. Electromagnetic pollution has been recognized as ranked in the air pollution, water pollution, noise pollution after the fourth major public hazard. The United Nations Conference on the Human Environment will be included in the electromagnetic radiation must be controlled one of the main pollutants. Electromagnetic radiation includes both electrical equipment such as television stations, substations, electromagnetic wave transmission towers, such as the operation of high-intensity electromagnetic waves, including computers, televisions, cell phones, microwave ovens and other household appliances produced when using electromagnetic radiation. These electromagnetic radiations fill the space, are colorless, tasteless and invisible, and can penetrate many kinds of substances, including the human body. If the human body is exposed to more than a safe dose of radiation for a long period of time, the cells will be killed or killed on a large scale. According to foreign data, electromagnetic radiation has become one of the disease-causing sources that jeopardize human health today. Investigation shows that in the electromagnetic wave field above 2 milligauss, the incidence of leukemia in the population is 2.93 times of the normal environment, and the incidence of muscle tumor is 3.26 times of the normal environment. Most experts at home and abroad that electromagnetic radiation is one of the causes of childhood leukemia, and can induce human cancer cell proliferation, affecting the human reproductive system, leading to children's intellectual disability, affecting the human cardiovascular system, and people's visual system has an adverse effect.
However, experts also pointed out that there is no need to be too afraid of radiation, because radiation is not a strong carcinogenic factor, and will not cause "special cancer", but only to increase the incidence of cancer. According to the statistical analysis of the existing data, only 4% of the tumors are caused by ionizing radiation. Moreover, the harm of radiation can be prevented and the damage caused by radiation can be treated.
Avoiding radiation hazards focuses on strengthening protection. Those engaged in related work must comply with operating regulations to minimize the chance of accidental exposure. The general public should minimize unnecessary medical exposure, in the diagnosis of disease can be diagnosed by other methods, do not do radiological examination, need to do radiological examination should be preferred to film rather than X-ray fluoroscopy, because fluoroscopy is subject to a much larger dose of irradiation than filming. Do not pick up unknown objects to avoid accidentally picking up radioactive sources.
The radiation waves emitted by computers are often overlooked. According to the international MPR II radiation safety regulations: in the 50cm distance must be less than or equal to 25V/m radiation exposure.
But you know how much computer radiation? Computer radiation: 1, keyboard 1000V/m2, mouse 450V/m3, screen 218V/m4, host 170V/m5, Notebook 2500V/m
In addition, the radiation electromagnetic waves on the human body has eight major harm:
1, cellular cancer promotion
2, hormonal irregularities
3
4, dementia triggers
5, abnormal pregnancy abnormal birth
6, high blood pressure heart disease
7, electromagnetic wave allergies
8, an increase in suicides
Using computers you have to pay attention to the four major hazards of computer radiation are as follows:
1, the computer radiation pollution will affect the human body's circulatory system, immune, reproductive and metabolic functions, serious also induce cancer, and will accelerate the proliferation of cancer cells in the human body. `
2, affecting people's reproductive system is mainly manifested in men with reduced sperm quality, pregnant women with spontaneous abortion and fetal malformation, etc. 2.}N
3, affecting people's cardiovascular system manifested in palpitations, insomnia, some women with menstrual disorders, bradycardia, cardiac blood flow, sinus irregularities, leukocyte reduction, decreased immune function, etc. 5S
4, affecting people's visual system, the visual system is also affected by radiation pollution, which can cause cancer. >4, on people's visual system has an adverse effect due to the eyes belong to the human body on the sensitive organ of electromagnetic radiation, excessive electromagnetic radiation pollution will also have an impact on the visual system. The main manifestation of vision loss, causing cataracts and so on.