Cell phone will caused brain tumor? Why we still use it?

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Cell phones are not the only phones to cause concern about health problems. Today's high frequency cordless phones may emit a level of electromagnetic radiation similar to cellphones. For reasons of health and privacy, a growing number of scientist and other experts are dead set against cellphones. They say a cancer risk is associated with signals that have a strong wattage and high frequency. First generation cordless phones operate at about 60 MHz and the next ones ran at 900 MHz, higher than 835 MHz than cellphones. Two new studies have shown links between mobile phone usage and barain tumors. The studies are not absolutely conclusive but the American and Swedish authors have urged users to ration use of mobile phones until more is known. From the doctor, it found a correlation between phone use and cancer. His study showed that mobile phone use, regardless which side of the head is was held against, increased the risk of a brain tumor by almost two and a half times. It's scary to hear this. Tell me your opinion.