Cellphones "Possibly Carcinogenic" by World’s Leading Cancer Experts - IARC

The study, conducted by the WHO's International Agency for Research on Cancer, stops far short of saying phones cause cancer. Rather, the agency's grouped regular cellphone usage (defined as 30 minutes of talk-time per day) as a "possible" cause of glioma, a malignant form of brain cancer—up to a 40% increased chance, according to one cited study. As one researcher puts it, "There could be some risk, and therefore we need to keep a close watch for a link between cell phones and cancer risk." This might sound insignificant—the study says chance, as opposed to causation, can't be ruled out—but it's unprecedented.