The contrast is striking. Recently, the San Francisco Board of Supervisors voted 10-1 vote in favor of an ordinance requiring cell phone retailers in that city disclose cell phones’ specific absorption rate, or SAR, to customers.
The same day, a study was published that further substantiates the safety of cell phone use. Mobile phone base stations and early childhood cancers: case-control study, BMJ 2010;340:c3077. The study, in the British Medical Journal, showed no link between proximity to cell phone towers and increased cancer risk to children whose mothers were pregnant while living near such towers.
The study looked at almost 7,000 children and incidence of early childhood cancers across Great Britain. This was compared with data from Britain’s four national mobile phone operators — Vodafone, O2, France Telecom’s Orange, and Deutsche Telekom’s T-Mobile — on more than 80,000 mobile phone towers used from 1996 to 2001. The researchers found that those who developed cancer before the age of five were not more likely to have been born close to a tower than their peers. The scientists found no association between risk of cancer in young children and estimated exposures to radiofrequency from mobile phone base stations during pregnancy.
MassTortDefense notes some strengths in the study: its size and national coverage, avoiding selection and reporting bias in the choice of cases and areas for study. Also, because it focused on early childhood cancers, it avoided issues of long latency that can affect interpretation of some mobile phone studies in adults.
The study adds to a growing body of scientific research which has found no links between cell phones and cancer. Use of mobile phones has increased markedly in recent years. In the United Kingdom, the number of mobile connections has risen from just under nine million in 1997 to almost 74 million in 2007.
In light of the real science, we wonder if the ordinance will actually mislead consumers with point of sale requirements implicitly suggesting that some phones are “safer” than others based on radiofrequency (RF) emissions. In fact, all phones sold in the U.S. must comply with the Federal Communications Commission’s safety standards for RF emissions.