Google announced Tuesday that it will one day run entirely on solar and wind energy.
Usually, those kinds of announcements have a far-flung deadline. But for Google, it will start in 2017, according to a press release.
The tech giant has signed deals with renewable energy producers. Google, like other companies, buys renewable energy up front, allowing the producers to expand and add their clean energy to normal power grids.
Thus, Google effectively consumes no net fossil fuels.
Google said it was a year ahead of schedule.
Joe Kava, Google's senior vice president of technical infrastructure, said wind was better than fossil fuels since its prices are more static, so it can plan better. And buying more renewable energy makes it cheaper.
It's good for the economy, good for business and good for our shareholders.
Google claims it's the world's largest buyer of clean energy, which is hard to verify. It bought 5.7 terawatt-hours of clean energy in 2015, which experts say is roughly two coal power plants' worth.
Google clearly needs every last drop, since the search engine giant used as much energy as the city of San Francisco last year.
What's Google's competition doing?
Other Silicon Valley leaders have made dramatic shifts to use more clean energy.
Amazon reiterated a long-term commitment to solar power last week, though it isn't quite at Google's usage of clean energy yet.
Here's how Google stacks up to the competition, according to the press release.
But critics have raised doubts, since much of so-called "clean" energy is intermittent, while Google can't exactly afford to have YouTube or its search engine go down at any point. That means it still relies heavily on fossil fuels -- for now.
"It's a PR gimmick," Chris Warren of the Institute for Energy Research told The New York Times.
Google CEO Sundar Pichai still seemed proud of the accomplishments.
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