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Renewable Energy For Cloud Computing

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Renewable Energy For Cloud Computing – “Data is the new oil” may have outlasted its usefulness as a metaphor, but one aspect still rings true. Both industries have a serious environmental footprint. According to the Department of Energy, data centers account for about 2 percent of all electricity use in the US.

That means the cloud—which powers every Netflix binge, PUBG match, and email—has a lining made not of silver, but of carbon. For individuals, the bits in question don’t amount to much. The digital footprints of businesses, however, can be large enough to ding the environment.

For them, finding the greenest way to store their data would help cut down on their emissions. But how does a high-minded plutocrat go about that? The answers are not always obvious.

The top three cloud providers—Amazon Web Services, Google Cloud, and Microsoft Azure—account for approximately two-thirds of all rentable computing services, so WIRED has compiled a guide to help you understand how they decarbonize your data.

What Makes a Cloud Green?

Some companies still store their data in blinking black boxes in a hallway closet. Others have such massive computing needs that they’ve built their own data centers. For everyone in between, there are basically three options: pay either Amazon, Microsoft, or Google for the privilege of stuffing your data into one of their mind-boggingly large “hyperscale” server farms.

To assess the relative greenness of different clouds, Jonathan Koomey, an expert on the topic, highlights three metrics: The efficiency of a data center’s infrastructure (lights, cooling, and so on), the efficiency of its servers, and the source of its electricity.

Each of the Big Three cloud providers has ironed out inefficiencies in the hardware and software running in their data centers. They run virtual machines on their servers to limit downtime, install custom cooling systems, automate wherever possible, and so on.

This ruthless pursuit of efficiency has helped the data center industry keep its energy needs fairly constant over the past decade. It also means that when companies move their data from in-house servers to the cloud, they will almost certainly end up reducing their energy consumption.

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It won’t stay that way forever, warns Dale Sartor, a staff scientist at the Lawrence Berkeley National Laboratory who studies energy efficiency. Someday we’ll hit a tipping point, when most organizations have already moved their data centers offsite. Then the energy demands of the cloud will start to rise.

“I don’t think anybody envisions a reduction in the growth of our appetite for computation,” Sartor says. “So the chances we’re going to see an explosion in energy use sometime in the next couple of decades is pretty high.”

That’s why a critical measure of a data center’s greenness is the source of its energy. The Big Three have all pledged to completely decarbonize their data centers, but none has entirely ditched fossil fuels yet.

To clean up their carbon footprints, these companies lean heavily on a tool known as a renewable energy credit, which is basically a token representing a utility’s green energy generation. RECs are how companies like Google and Microsoft can claim their data centers are powered 100 percent by renewables while still being connected to grids that use fossil fuels.

In reality, only a fraction of each company’s energy comes directly from solar or wind installations; the rest comes from RECs.

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