Exactly, the spectrum is limited. I'm not sure power is constant. I can't remember any of the detail but as the density of base stations grows with peak volume needs it becomes feasible to use the network dynamically so base stations can be shut down for extended periods when demand is low, with 'on' cells picking up the traffic.
Personally I have bigger worries than radio waves, so essentially I agree with you. I'm pretty sure something else will get me first. Certainly cellphone transmission power is very much lower with digital than analogue (maybe a tenth, or better).
Cellular technology is seriously impressive to me, on the level of magic really, and there is much more to come as I perceive it. I still marvel at the casual use of mobiles for mostly trivial purposes by nearly everybody. Makes me wonder what could be achieved through technology where it really matters.
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Expect a telegraph pole by your drive ? new
Expect a telegraph pole by your dr.. new