In Your Life
Cell PhonesNine out of 10 Americans use them. Despite no definitive evidence, rumors of health risks have continued to crop up. Recently a joint review published in the Journal of Clinical Oncology concluded that the radio-frequency waves emitted by cell phones could, in fact, be linked to a mild increased risk of brain tumors.
The middle ground: “In general, the shorter the conversation, the smaller your exposure,” says Leeka I. Kheifets, Ph.D., a professor of epidemiology at the University of California, Los Angeles, who has studied the effects of cell-phone radiation. For calls lasting more than two minutes, use an earpiece or the phone’s speaker; this can cut wave exposure by 1,000 times. And when you have a weak signal, don’t make a call. Your body is subjected to a higher exposure when a phone has to boost its radio signal to get connected.