How dangerous is your cell phone?

SAN FRANCISCO --- Imposing roughly the same cautionary standards for cellphones as for fatty food or sugary soda, this city --- never shy about its opinions --- voted on Tuesday to require all retailers to display the amount of radiation each phone emits...

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Under the law, retailers will be required to post materials --- in at least 11-point type --- next to phones, listing their specific absorption rate, which is the amount of radio waves absorbed into the cellphone user's body tissue. These so-called SAR rates can vary from phone to phone, but all phones sold in the United States must have a SAR rate no greater than 1.6 watts per kilogram, according to the Federal Communications Commission, which regulates the $190 billion wireless industry.