EM is not a single thing that can be generalized about... if EM is so harmless.. try sticking your head in a microwave oven!
Some frequencies are proven harmfull.. some are pretty much proven benign.
I really dont know if cell phones are harmfull.. doesnt seem so unreasonable that they could be..
Of course my opinion could be biased because of exposure to certain EM pulses.. ie. I watched alot of 3-Stooges when I was young!
