San Francisco is close to becoming the first city in the nation to require retailers to post next to cell phones the amount of radiation emitted by the devices.
The city's Board of Supervisors voted 10-1 Tuesday to give preliminary approval to the proposal. The board is expected to give final approval next week, and Mayor Gavin Newsom, an early proponent, is expected to sign the proposal into law.
Potential health risks from cell phone radiation has been debated for years. Despite numerous studies, there's no clear scientific evidence that mobile phones increase risks for cancer or any other illness. Last month, for example, a 10-year study released by the World Health Organization failed to turn up any conclusive evidence.
The San Francisco proposal would require retailers to post the "specific absorption rate" next to mobile phones. The Federal Communications Commission require cell phone makers to register the SAR, which is a measurement of the amount of radiation absorbed by the human body.