The Dangers of Cellular Phones

摘要

The number of people using cellular telephones1today is greatly increasing.About two hundredmillion people use cellular telephones around theworld.However,this number is only a guess.Thereis no way to tell how many people in the world usecellular phones.Widespread use of cellular phoneshas led to increased concerns about possible healthrisks.Cellular phones may cause brain cancer orother cancers.