Cellphone Radiation A Danger? 'Reply Hazy; Ask Again Later'

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San Francisco wants to let consumers know about the radiation coming out of their cellphones. On Tuesday, the city's Board of Supervisors passed a measure requiring point-of-sale displays to provide information on the amount of radiation their devices emit.  Mayor Gavin Newsom is expected to sign the measure into law. But should consumers actually be worried?

A scientific study published in the International Journal of Epidemiology found no significant increased occurrence of brain tumors in cellphone users over the 10 year study... but said that 'the possible effects of long-term heavy use of mobile phones require further investigation.' (Comforting, right?) The cellphone industry insists that radiation levels from mobile phones are too low to cause any damage. But some scientists and consumer advocates say those studies are not enough to draw a complete conclusion - and that cellphone users should take precautions, until we know more.  We talk with David Momrow, Senior VP of Cancer Control for New York and New Jersey at the American Cancer Society, to sort through the science and find out what we can do.