"Mobile Cancer Theory" emerging again suggest careful use of cottage machine

Reporter Wu Weiqing recently, the World Health Organization (WHO) International Agency for Cancer Research claims that the radio-frequency electromagnetic fields produced by mobile phones may be carcinogenic to humans. This argument, the U.S. wireless communications industry organizations and manufacturers fiercely retort.　　Domestic experts also said that "mobile phone cancer Theory" evidence is limited, the conclusion is unconvincing.　　In fact, there is a long-standing debate about whether mobile phones will have an impact on health. August 2008, China issued the "mobile phone electromagnetic radiation local exposure limit value", the provision of mobile phone electromagnetic radiation than the absorption rate (SAR) must not exceed 2.0 watts/kg. SAR reflects the proportion of radiation absorbed by the body's head, the smaller the lower the radiation. In China, larger manufacturers generally indicate SAR values in manuals or user manuals. It's just that when we buy a cell phone, we don't usually pay attention to it.　　However, the mobile phone is not the same, some of the mobile phones in order to pursue power, in the radiation over the national standards, so use mobile phones to be cautious. Among the many preventive measures, the World Health Organization and many Governments have emphasized that teenagers should be cautious about using mobile phones. Teenagers ' ears and skulls are smaller and thinner than adults, and when they use their cellphones, the brain absorbs more radiation than adults. Experts suggest that using hands-free devices such as earplugs, or texting, can reduce cell phone radiation.　　China's relevant research reports also believe that the type of antenna to mobile phone radiation, the strength of the current popular Pifa and single-stage two built-in antennas, PIFA antenna radiation is lower, and experts believe that the bar and pocket-type mobile phone radiation is greater. In addition, experts suggest less phone calls in places where the signal is weak. Because, when the signal is poor, the power of the phone will automatically increase, resulting in the intensity of its radiation increases.　　By the same token, the use of mobile phones in small, enclosed environments such as elevators can also increase the intensity of radiation. It is reported that many handset manufacturers have begun to warn consumers to maintain the distance between the phone and the body, such as IPhone4 's safety manual said, in the voice call or wireless transmission through the mobile phone network, the body and the iphone at least 15 centimeters away.　　BlackBerry is recommended to maintain a distance of at least 25 cm, because the intensity of electromagnetic radiation with the increase in distance, can be greatly attenuated. Font enlargement font Zoom out on the default size