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The refrigerator I have today is larger, cooler, and uses less energy then the one I'd buy 30 years ago.

My phone uses less power then the one I had 5 years ago, as does my PC.

In fact every industrial manufacturing process today is using less energy then it was in the past.



And yet, the industrial manufacturing sector uses more! As does the computing sector.

This is because energy consumption reduction due to efficiency improvements goes -- to be very generous -- as 1/t, and exponential growth goes as e^t, and e^t/t is still exponential for large t.




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