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Original author: 
Sean Gallagher

Think mobile devices are low-power? A study by the Center for Energy-Efficient Telecommunications—a joint effort between AT&T's Bell Labs and the University of Melbourne in Australia—finds that wireless networking infrastructure worldwide accounts for 10 times more power consumption than data centers worldwide. In total, it is responsible for 90 percent of the power usage by cloud infrastructure. And that consumption is growing fast.

The study was in part a rebuttal to a Greenpeace report that focused on the power consumption of data centers. "The energy consumption of wireless access dominates data center consumption by a significant margin," the authors of the CEET study wrote. One of the findings of the CEET researchers was that wired networks and data-center based applications could actually reduce overall computing energy consumption by allowing for less powerful client devices.

According to the CEET study, by 2015, wireless "cloud" infrastructure will consume as much as 43 terawatt-hours of electricity worldwide while generating 30 megatons of carbon dioxide. That's the equivalent of 4.9 million automobiles worth of carbon emissions. This projected power consumption is a 460 percent increase from the 9.2 TWh consumed by wireless infrastructure in 2012.

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An anonymous reader writes with this excerpt from Edible Apple: "Apple didn't release the first tablet computer or even come up with the idea for tablet computing itself. If anything, Microsoft, and Bill Gates in particular, were championing tablet computers years before the iPad was released. In this video clip from the first All Things D conference in 2003, former Apple CEO Steve Jobs explains to Walt Mossberg why Apple, at the time, wasn't keen on tablets and more specifically, why Jobs felt that stylus computing and handwriting recognition were inherent failures."

Read more of this story at Slashdot.

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