WHO has classified mobile phones as possibly carcinogenic, along with lead and other nasties. So I reevaluated my thoughts on the matter, did some light research, and of course I will agree with the classification of possibly carcinogenic. What must be understood, is that this occurs not because of the ionising potential of the microwave and frankly, thermal and nonthermal effects are still subject to debate. Some effects have been observed, although observed in only one experiment, as you may know, hence being subject to questionable reliability, that show microwaves do indeed slow down the movement of sperm. Whether or not this is permanent I do not know. Also, it is unfortunate, but the eyes do not have a very good method of thermal dissipation and hence are susceptible to damage by the heating effects of microwaves. In regards to its carcinogenicity, reports are as of yet inconclusive, but since mobiles have existed for only 20 years, beeing popular in the last 12-15, there is much more data to be gathered. Sort of like the atmospheric gases data. Finally, a 2009 study examined the effects of exposure to radiofrequency radiation (RFR) emitted by standard GSM cell phones on the cognitive functions of humans. The study confirmed longer (slower) response times to a spatial working memory task when exposed to RFR from a standard GSM cellular phone placed next to the head of male subjects, and showed that longer duration of exposure to RFR may increase the effects on performance. Right-handed subjects exposed to RFR on the left side of their head on average had significantly longer response times when compared to exposure to the right side and sham-exposure.
Remember, the microwaves emitted by microwaves are quite low, so try not to be paranoid.
Feel free to draw your own conclusions. Personally, I will continue using my mobile.
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