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These long-term contracts range from 10-20 years and provide projects with the financial certainty and scale necessary to build these wind and solar facilities—thus bringing new renewable energy onto the grid in these regions. For our part, these contracts not only help minimize the environmental impact of our services—they also make good business sense by ensuring good prices.

Our commitment to a sustainable energy future
Since we opened our very first owned data center in 2006, we’ve been working to promote renewable and sustainable energy use in several ways:

  • First, we’re building the world’s most efficient computer infrastructure by designing our data centers to use as little energy as possible.
  • Second, we're driving the renewables industry forward by fully committing to renewable sources. In 2010, we entered our first large-scale renewable power purchase agreement with a wind farm in Iowa, and we subsequently completed a number of similar large-scale energy purchases over the past five years. Today’s announcement is another milestone in this area.
  • Third, we've worked with our utility partners to help promote transformation in the utility sector. In 2013 we created a new program that enables customers like Google to buy large amounts of renewable energy directly from their utilities. Today's announcement includes the first solar project enrolled under that program. And this past summer we announced that our newest data center will be on located on the site of a retiring coal plant and will be 100% renewable powered from day one.
  • Fourth, beyond our efforts to power our own operations with renewables, we’ve made separate agreements to fund $2.5 billion into 22 large-scale renewable energy projects over the last five years, from Germany to Kansas to Kenya. These investments have been in some of the largest and most transformative renewable energy projects in the world with a goal to help drive renewable energy development not only as a customer but as an investor, and bring down costs for everyone.

And we’re also working on new technologies and ideas—ranging from Project Sunroof to Makani Power to air quality monitoring—that we hope can make a cleaner energy future an option for many more people.

With world leaders coming together at the COP21 UN conference on climate change in Paris this week, there's no better time to focus on renewable energy. We hope that our efforts play a small part in boosting all of us in the race to solve climate change.

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At Widows Creek, we can use the plants’ many electric transmission lines to bring in lots of renewable energy to power our new data center. Thanks to an arrangement with Tennessee Valley Authority, our electric utility, we’ll be able to scout new renewable energy projects and work with TVA to bring the power onto their electrical grid. Ultimately, this contributes to our goal of being powered by 100% renewable energy.

In 2010, we were one of the first companies outside of the utility industry to buy large amounts of renewable energy. Since then, we’ve become the largest corporate renewable energy purchaser in the world (in fact we’ve bought the equivalent of over 1.5 percent of the installed wind power capacity in the U.S.). We're glad to see this trend is catching on among other companies.

Of course, the cleanest energy is the energy you don’t use. Our Alabama data center will incorporate our state-of-the-art energy efficiency technologies. We’ve built our own super-efficient servers, invented more efficient ways to cool our data centers, and even used advanced machine learning to squeeze more out of every watt of power we consume. Compared to five years ago, we now get 3.5 times the computing power out of the same amount of energy.

Since the 1960s, Widows Creek has generated power for the region—now the site will be used to power Internet services and bring information to people around the world. We expect to begin construction early next year and look forward to bringing a Google data center to Alabama.

There will be obstacles to overcome (like the conventional wisdom of engineering). But whoever gets it done will help change the future of electricity. A smaller inverter could help create low-cost microgrids in remote parts of the world. Or allow you to keep the lights on during a blackout via your electric car’s battery. Or enable advances we haven’t even thought of yet.

Either way, we think it’s time to shine a light on the humble inverter, and the potential that lies in making it much, much smaller. Enter at littleboxchallenge.com—we want to know how small you can go.

The mechanical plant at our facility in The Dalles, Ore. The data center team is constantly tracking the performance of the heat exchangers and other mechanical equipment pictured here.

What Jim designed works a lot like other examples of machine learning, like speech recognition: a computer analyzes large amounts of data to recognize patterns and “learn” from them. In a dynamic environment like a data center, it can be difficult for humans to see how all of the variables—IT load, outside air temperature, etc.—interact with each other. One thing computers are good at is seeing the underlying story in the data, so Jim took the information we gather in the course of our daily operations and ran it through a model to help make sense of complex interactions that his team—being mere mortals—may not otherwise have noticed.
A simplified version of what the models do: take a bunch of data, find the hidden interactions, then provide recommendations that optimize for energy efficiency.

After some trial and error, Jim’s models are now 99.6 percent accurate in predicting PUE. This means he can use the models to come up with new ways to squeeze more efficiency out of our operations. For example, a couple months ago we had to take some servers offline for a few days—which would normally make that data center less energy efficient. But we were able to use Jim’s models to change our cooling setup temporarily—reducing the impact of the change on our PUE for that time period. Small tweaks like this, on an ongoing basis, add up to significant savings in both energy and money.

The models can predict PUE with 99.6 percent accuracy.

By pushing the boundaries of data center operations, Jim and his team have opened up a new world of opportunities to improve data center performance and reduce energy consumption. He lays out his approach in the white paper, so other data center operators that dabble in machine learning (or who have a resident genius around who wants to figure it out) can give it a try as well.


These results indicate that the Internet offers huge potential for energy savings. We’re especially excited that Berkeley Lab has made its model publicly available so other researchers and experts can plug in their own assumptions and help refine and improve the results.

Of course, understanding the impact of shifting office applications to the cloud is only part of the story, which is why last week we hosted a summit called “How Green is the Internet?” to explore these questions in greater detail. At the summit, experts presented data on how the growth of Internet infrastructure, including devices like phones and tablets, can impact the environment. We also saw great excitement about the potential for entirely new Internet-enabled tools in areas like transportation, e-commerce and digital content to deliver huge energy and carbon savings. We’ve posted the videos from those sessions and invite you to take a look.



One of our goals in hosting the summit and supporting the Berkeley Lab study was to identify and encourage new research on this topic. We’ll continue to work to answer some of these questions, and we hope others will too.



When we consider investing in a renewable energy project, we focus on two key factors. First, we only pursue investments that we believe make financial sense. South Africa’s strong resources and supportive policies for renewable energy make it an attractive place to invest—which is why it had the highest growth in clean energy investment in the world last year. Second, we look for projects that have transformative potential—that is, projects that will bolster the growth of the renewable energy industry and move the world closer to a clean energy future. The Jasper Power Project is one of those transformative opportunities. To explain why, perhaps some background would be helpful.

Back in 2008, South Africa experienced a severe energy shortage, which resulted in blackouts throughout the country and slowed down economic growth. Since then the South African government has been actively supporting the growth of new sources of electricity to power the nation. While today South Africa is primarily dependent on fossil fuels, there’s lots of potential for renewable energy—it’s a country blessed with abundant wind and solar resources—and the government has set an ambitious goal of generating 18 gigawatts (GW) of renewable energy by 2030 (as a comparison, the entire South African grid is currently 44 GW).

To meet this goal, the South African government has established the Renewable Energy Independent Power Producer Procurement Program (REIPPPP). Through the program, renewable energy projects compete on the basis of cost and contribution to the local economy to be awarded a contract with Eskom, South Africa’s state-owned energy utility. Jasper and the other projects being developed through the REIPPPP have the potential to transform the South African energy grid. And given South Africa’s position as an economic powerhouse in Africa, a greener grid in South Africa can set an example for the whole continent.

Once constructed, the project will use solar panels like these.

Just as compelling are the economic and social benefits that the project will bring to the local community. Jasper will create approximately 300 construction and 50 permanent jobs in a region experiencing high rates of unemployment, as well as providing rural development and education programs and setting aside a portion of total project revenues—amounting to approximately $26 million over the life of the project—for enterprise and socio-economic development. We appreciate how forward-thinking the South African government has been in designing the REIPPPP to encourage these kinds of local economic benefits.

Google has committed more than $1 billion to renewable energy investments and we continue to search for new opportunities. Our search has brought us from the U.S. to Europe and now to Africa. We’re excited to see where else it might lead.

Posted by Rick Needham, Director, Energy & Sustainability
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Our Lenoir, N.C. data center

Offering companies like Google a renewable energy option has many advantages. Because the service is made available to a wide range of customers, companies that don’t have the ability or resources to pursue alternative approaches can participate. And by tapping utilities’ strengths in power generation and delivery, it makes it easier for companies to buy renewable energy on a larger scale. Of course, the approach is not without its challenges: utilities will need to work out the mechanics of the service within their local regulatory structure, and in many cases state utility commissions will need to approve the programs. There’s also the challenge of finding cost-effective renewable projects.

We'll continue to find creative ways to supply our facilities with renewable energy, but we think this solution can provide an important new way to increase the use of renewable energy nationwide. We look forward to working with utilities, state utility commissions, companies and other stakeholders to make it a reality.

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A typical organization has a lot more servers than it needs—for backup, failures and spikes in demand for computing. Cloud-based service providers like Google aggregate demand across thousands of people, substantially increasing how much servers are utilized. And our data centers use equipment and software specially designed to minimize energy use. The cloud can do the same work much more efficiently than locally hosted servers.

In fact, according to a study by the Carbon Disclosure Project, by migrating to the cloud, companies with over $1 billion in revenues in the U.S. and Europe could achieve substantial reductions in energy costs and carbon emissions by 2020:


We’ve built efficient data centers all over the world, even designing them in ways that make the best use of the natural environment, and we continue working to improve their performance. We think using the super-efficient cloud to deliver services like Google Apps can be part of the solution towards a more energy efficient future.

Posted by Urs Hoelzle, Senior Vice President for Technical Infrastructure

(Cross-posted on the Google Green Blog)
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