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Thu-Huong Tu Using Cell Phone (Rough Draft) "There are no established health effects from cellular phone radio waves or transmitters that operate within FCC or state guidelines," says HSPH researcher Peter Valberg, adjunct faculty member in the Department of Environmental Health. The use of cellular phones has skyrocketed in recent years, with more than 117 million subscribers in the United States as of July 1, 2001. The number of people who is using cell-phone is increasing more and more everyday because it is an accessible way to communicate with other people. However, it is a distraction to many people at some places, and it also affects the driver's performance. Many people feel really annoy when they heard a phone ring from someone while they are trying to concentrate on doing something. It is an impolite action if you leave your cell phone's ringing tone on when you are at a...

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