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Shrinking What happens to our body when we talk too much mobile phone? Can electromagnetic waves emitted by the handset can cause permanent damage to our brains? Can we "boiled" egg, placing it between two GSM-a? Urban legends doorknocker earrings on the subject are more than abundant. On 21 May the TV channel BBC 1 even present in its program "Panorama" investigation doorknocker earrings of the damage of the wireless technologies for data transmission, doorknocker earrings and in particular for Wi-Fi networks. The problem raises extremely controversial and the site of bbc.co.uk can be found materials protecting (denying) both points. Each wireless network consists of an access point or router that emits a signal receiver and computer (LAN card). Wi-Fi standard uses radio waves with a frequency of 2.4 GHz, which coincides with the frequency of microwave ovens and Bluetooth doorknocker earrings technology for communication between different portable devices (named after the Danish King Harold - Blue tooth, whose enviable diplomatic gift helped third warring parties to resolve disputes with negotiations, not war). Uniform frequency can create interference between devices, if their working channels match. According to unofficial data in the world today there are more than 100,000 wireless Internet networks (www.jiwire.com/press-100k-hotspots.htm). There are whole cities, where virtually anywhere Internet. Wireless signal can be found in many public places such as airports, hospitals, restaurants, offices and homes. And 70% of British schools ... The last raises questions about the harmfulness of electromagnetic (EM) fields and in particular of the radio waves. If we consider that the bones of children face are "permeable" for electromagnetic waves and the widespread use of mobile phones, the study of the problem is not irrelevant. In practice, we are surrounded by "electromagnetic smog" - signals of televisions and radios, cell phones, microwaves, radar, etc. Among them Wi-Fi technology is the weakest emitter doorknocker earrings - as a microwave oven is 100 000 times more intense than a router. Dr. Kenneth Foster of the University of Pennsylvania, USA, measured emission frequency range 75MHz - 3GHz in 55 cities in four different countries (Health Phys 2007; 92: 280) and found that even next to the Wi-Fi access point where the signal is strongest and in conditions of maximum traffic (download or upload large file) emitted radiation is "far less than the ambient radio background". The same is true for the field to the computer network card. Measured by Dr. Foster electromagnetic radiation are hundreds of times lower and accepted potentially dangerous according to international standards (www.icnirp.de/pubEMF.htm). According to Dr. Michael Repacholi, head of the group for examining the impact of EM radiation on human health to the World Health Organization (WHO), as well as Wi-Fi technology and mobile phones, are harmless (Environ Health Perspect doi: 10.1289 / ehp.9633 ; http://dx.doi.org). This is the official position of the WHO at the time. Unfortunately, the position of Dr. Repacholi is based on nedokazuemostta (so far) of the harmful doorknocker earrings effects doorknocker earrings caused by radio frequency waves that are around us and in us (generally human growth is very suitable for antenna). They exist since there are radio and television, ie more than 50 years. With such an argument, however, and tobacco was a harmless water to about 1955, before being adopted doorknocker earrings as the number one cause of lung cancer and many other deadly diseases. Moreover, Dr Repacholi consult manufacturers of wireless devices, doorknocker earrings which further doorknocker earrings discredit his position, and WHO. And finally - he ignores all other sources of electromagnetic waves except the weak such as Wi-Fi, as well as scientific data to their harmful effects. Then enter so many researchers, protecting the safety of wireless technology. The truth, as always, is probably somewhere in between. Therefore, Sir William Stewart, chairman of the Agency for Healthcare UK advises doorknocker earrings to rethink regulations on the issue with a view to accumulated doorknocker earrings scientific data on the effect of electromagnetic radiation on human health. So far, however scientifically sound conclusions can not be made, but some observations about the harmfulness doorknocker earrings of radio there, and they should not be ignored. Sir Stewart recommended children under 16 years should not use mobile phones because