While major cities around the world rush to blanket neighborhoods with free wireless Internet access, critics are questioning the health risks that might be created by a wired London or a Paris transformed from the City of Light to City of Hot Spots.The nagging fear is that electromagnetic waves emitted by wireless technology could become the tobacco smoke of the 21st century. Some environmentalists are already demanding restrictions, and government officials in some countries are issuing warnings to limit use and seeking reviews of the long-term health impact of exposure to wireless networks and mobile telephones.
http://iht.com/articles/2007/09/23/news/wireless24.php