Cell Phones May Be 'Carcinogenic': Scientists WHO cancer agency ranks them in same category as DDT By John Johnson, Newser Staff Posted May 31, 2011 1:32 PM CDT 10 comments Comments (Shutterstock) (Newser) – The evidence linking cell phones and other wireless devices to cancer seems to be getting stronger: An international team of scientists has concluded cell phones are "possibly carcinogenic to humans," reports AFP. After reviewing scores of published studies on the issue, the International Agency for Research on Cancer—an arm of the World Health Organization—ranked cell phones in category 2B, the same as DDT and gasoline engine exhaust. The finding now goes to WHO and other health agencies, which may issue official warnings on use, notes AP. The radio frequency electromagnetic fields generated by the phones and other such devices got the ranking "based on an increased risk for glioma, a malignant type of brain cancer," the agency said. Similar concerns have been around for a while. Click for one writer's safety check list.