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I'm surprised to hear it takes 7 kWh to transmit 1 GB. My phone consumes only 0.3 kWh a month and I use 1 GB. So the power requirements are very asymmetric.

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That probably factors in the infrastructure it takes to deliver the data.

Yes, it is comparing what it takes to load a file from disk or from remote. It needs to include the share of the used infrastructure for that.

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