And nobody is certain what effect this will have. Just as a microwave oven warms meat, a cellular phone, when held near your ear, will warm your brain. And there may be other effects as well. Numerous studies have shown increases in maladies such as brain tumors, leukemia, and lymphoma among people exposed to high levels of microwave radiation - the type emitted by portable phones. The questions are really on how strong these effects are.
Independent scientists tend to take a more cautious approach.
And moreover, he claims, the Japanese Ministry of Posts and Telecommunications, which supervises this area, is doing its best to make sure that these dangers are not known. It sounds like something from a tampon commercial, but it's really a measure of how much electromagnetic energy is absorbed by a certain object - such as a human body, or a human brain. In fact, to be quite honest, nobody really understands them all that well, not even the experts. In that area, the temperature may rise a degree or so compared to the surrounding tissue. In fact, it is now well established that there is no known safe dose of radioactivity.