The WHO statement says:
The evidence was reviewed critically, and overall evaluated as being limited to among users of wireless telephones for glioma and acoustic neuroma, and inadequate to draw conclusions for other types of cancers. The evidence from the occupational and environmental exposures mentioned above was similarly judged inadequate. The Working Group did not quantitate the risk; however, one study of past cell phone use (up to the year 2004), showed a 40% increased risk for gliomas in the highest category of heavy users (reported average: 30 minutes per day over a 10‐year period).
Dr Jonathan Samet (University of Southern California, USA), overall Chairman of the Working Group, indicated that “the evidence, while still accumulating, is strong enough to support a conclusion and the 2B classification. The conclusion means that there could be some risk, and therefore we need to keep a close watch for a link between cell phones and cancer risk.
Then in another part of the statement, the WHO says:
It is understandable that people are concerned about mobile phones, especially because they are so widely used. But so far, the published studies do not show that mobile phones could increase the risk of cancer. This conclusion is backed up by the lack of a solid biological mechanism, and the fact that brain cancer rates are not going up significantly.
However, all of the studies so far have weaknesses, which make it impossible to entirely rule out a risk. Mobile phones are still a new technology and there is little evidence about effects of long-term use.
So what does all this mumbo jumbo mean? Well, the team of experts found enough evidence to categorize personal exposure as “possibly carcinogenic to humans.” The WHO gave cell phones a “2B” classification, meaning they are possibly carcinogenic in humans in line with other 2B substances like the pesticide DDT, chloroform, and gasoline engine exhaust. But where did that come from? To be honest, it baffles me. If there’s not sufficient data, why are we blasting headlines all over the place about how cell phones cause cancer- when we still aren’t sure they do? Frankly, I don’t get it.