How much energy does the Internet use?
by Ozzie Zehner
This article offers a quick look at how much energy it takes to power the Internet, computers, phones and other devices. And, it places those numbers in the context of other human activities.
The embodied power—the emergy of devices divided by their replacement lifespan—is roughly equivalent to their wall-socket power consumption. That is, looking at wall-socket electricity ignores half of actual energy use for computing devices.