I see it as the total opposite, the technology is only getting better.. less energy for more hashing power. Shit 2 years ago a 5 GH/S rig would draw probably somewhere around 2000 watts or something (or more). Now a 5 gh/s Asic rig draws like 30 watts. The technology will only improve, and miners will move to places with cheap energy, or invest into free energy sources themselves. Maybe bitcoin will give the alternative energy sector a kick in the ass.
How much energy does the current banking sector use? What about paypal. How much energy is burned with all these employees going back and forth to work each day?
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