The Surprisingly Large Energy Footprint of the Digital Economy [UPDATE]

Which uses more electricity: the iPhone in your pocket, or the refrigerator humming in your kitchen? Hard as it might be to believe, the answer is probably the iPhone. As you can read in a post on a new report by Mark Mills — the CEO of the Digital Power Group, a tech- and investment-advisory firm — a medium-size refrigerator that qualifies for the Environmental Protection Agency’s Energy Star rating will use about 322 kW-h a year. The average iPhone, according to Mills’ calculations, uses about 361 kW-h a year once the wireless connections, data usage and battery charging are tallied up. And the iPhone — even the latest iteration — doesn’t even keep your beer cold. (Hat tip to the Breakthrough Institute for noting the report first.) [UPDATE: You can see the calculations behind the specific iPhone comparison, which was done by Max Luke of the Breakthrough Institute, at the bottom of the post. It's important to note that the amount of energy used by any smartphone will vary widely depending on how much wireless data the device is using, as well as the amount of power consumed in making those wireless connections—estimates for which vary. The above examples assumes a relatively heavy use of 1.58 GB a month—a figure taken from a survey of Verizon iPhone users last year. (Details at bottom of post.) That accounts for the high-end estimate of the total power the phone would be consuming over the course of a year. NPD Connected Intelligence, by contrast, estimates that the average smartphone is using about 1 GB of cellular data a month, and in the same survey that reported high data use from Verizon iPhone users, T-Mobile iPhone users reported just 0.19 GB of data use a month—though that's much lower than any other service. Beyond the amount of wireless data being streamed, total energy consumption also depends on estimates of how much energy is consumed per GB of data. The top example assumes that every GB burns through 19 kW of electricity. That would be close  to

Nuclear Energy Is Largely Safe. But Can It Be Cheap?

Is it safe? That’s what most people — brought up on Three Mile Island, Chernobyl and The Simpsons — want to know about nuclear power. And for the most part, the answer is yes. Accidents are rare, and those that have occurred — including the partial meltdown in Fukushima, Japan, in 2011 — have resulted in few deaths. On a megawatt-per-megawatt basis, nuclear kills fewer people than almost any other source of electricity — especially compared with air pollution from coal, the single biggest supplier of electricity in the U.S., which contributes to the deaths of 14,000 Americans each year. And nuclear energy, unlike every other form of electricity — save hydro and renewables, doesn’t contribute to man-made climate change. But while nuclear energy supplies about 13% of global electricity — and dozens of new reactors are being built in countries like China, India and Russia — in the U.S. and much of the rest of the developed world, nuclear energy is in retreat, with new reactors on hold and aging ones being retired. And while fears of accidents and radioactivity clearly play a role in that decline, cost is an even bigger factor. Existing nuclear reactors produce inexpensive electricity, but the price of a new nuclear plant keeps ballooning, with reactors running billions over budget, forcing some utilities to abandon projects in midconstruction. Nuclear plants — most of which are derived from Cold War–era designs — actually became more expensive as they scale up, with larger plants requiring bigger and stronger containment domes that used expensive concrete and steel. Outside of France, nuclear plants largely weren’t standardized, which meant that nearly every reactor was produced bespoke — much like buying a suit from a tailor instead of off the rack. Add in the fact that the economic costs of an accident could be enormous even if the human costs weren’t — the Fukushima meltdown, which killed no one, could cost more than $100 billion — and you have a very expensive way to generate electricity. With the fracking revolution