Google’s recent solar and wind energy acquisitions will power its entire operation without a drop of fossil fuels, the company has announced. Google consumes as much energy as the entire city of San Francisco, making this a big step for renewable energy.

On Tuesday, Google proclaimed that it will have gone completely green by 2017, as a result of purchasing wind and solar energy. In a press release on the Google Blog, Senior Vice President Urs Holzle said that both Google’s data centers and offices will make the transition as a result of the purchase of electric from an Iowa wind farm and other renewable developers.

Google consumed 5.7 terawatt-hours of electricity in 2015, “which is nearly as much electricity as San Francisco used in the same year,” Google wrote in its white pages on the project.

Full story: rt.com