A group of scientists from the World Health Organization (WHO) met in Lyon, France to learn if cell phones are cancer causing, or carcinogenic. It is the electromagnetic waves that worries scientists and medical experts. Computers and tablets also produce electromagnetism, as they are run on battery power. The panel reviewed various types of studies, including exposure data, human cancer data, and animal models. They concluded that the evidence suggesting cell phones are indeed carcinogenic is limited for brain cancers, called gliomas. For other cancers, the evidence is inadequate. Overall, WHO says cell phones are possibly carcinogenic. More details are available here, in the press release.