Bit late in the day this - I just joined Mumsnet, but as someone who was made ill by a town wifi system (Glastonbury) I know wifi should be of concern to you.
In Europe it is thought that 3 ? 10% of the population is affected be this kind of radiation (electrosensitivity), and in Sweden it's a recognised disability. So, whilst it may not be acknowledged here in the UK, it would seem likely that we should have similar numbers affected and suffering headaches, dizziness, heart palpitations, etc. More significantly, studies show that children absorb more radiation in their brains than us adults so tend to be more adversely affected.
The UK Association of Teachers and Lecturers (ATL) have called for classroom wireless networks to be suspended. Members said they were concerned by scientific reports linking wi-fi with impaired concentration, loss of short-term memory, chromosome damage and increased incidence of cancer.
The UK Teachers Union, PAT, has said wireless computer networks in schools may be jeopardising children?s health and should be suspended pending a full safety enquiry.
The International Commission for Electromagnetic Safety (IECS) has advised against the use of wireless because of health concerns.
The European Environment Agency ? Europe's top environmental watchdog ? last year responded to the growing evidence by calling for immediate action to reduce exposure to radiation from Wi-Fi, mobile phones and their masts, suggesting that delay could lead to a health crisis greater than those associated with asbestos and smoking.
I?m sure most of you imagine that this technology wouldn?t have been rolled out without testing, but you would be wrong. Wifi has appeared in our lives without having to undergo any tests or safety checks whatsoever. It was developed as a way of accessing the unlicensed part of the radio spectrum for public use. So long as the technology met the basic requirements on interference and compatibility, manufacturers were allowed to use wifi radiation as they chose. The Government received huge sums for the use of these frequencies so they aren?t about to rush to admit any health risks.
The UK Health Protection Agency (HPA) will inform you that the exposure levels from these systems are well within the legal guidelines. However, the guidelines, set in 1996, are hopelessly out of date and only consider the thermal effects of this radiation ? i.e how hot you get. It is the pulsed high frequency of these wireless devices, which are ignored by our regulators, that cause the health problems. Our brains and nervous systems work by using electrical signals. Some scientists believe these signals are being interfered with by exposure to wifi radiation, and in 2007 at the London Conference they called for the regulations to be reviewed.
So - the technology may be great - but the health risks are real.
JS