cables; the first, named Curie, connects California with Chile and was completed on November 15, 2019. The second fully Google-owned undersea cable, named Dunant, connects the United States with France and is planned to begin operation in 2020. Google's third subsea cable, Equiano, will connect Lisbon, Portugal with Lagos, Nigeria and Cape Town, South Africa. The company's fourth cable, named Grace Hopper, connects landing points in New York, US, Bude, UK and Bilbao, Spain, and is expected to become operational in 2022. Environment In October 2006, the company announced plans to install thousands of solar panels to provide up to 1.6 Megawatt of electricity, enough to satisfy approximately 30% of the campus' energy needs. The system is the largest rooftop photovoltaic power station constructed on a U.S. corporate campus and one of the largest on any corporate site in the world. Google has aimed for carbon neutrality in regard to its operations. Google disclosed in September 2011 that it "continuously uses enough electricity to power 200,000 homes", almost 260 million watts or about a quarter of the output of a nuclear power plant. Total carbon emissions for 2010 were just under 1.5 million metric tons, mostly due to fossil fuels that provide electricity for the data centers. Google said that 25 percent of its energy was supplied by renewable fuels in 2010. An average search uses only 0.3 watt-hours of electricity, so all global searches are only 12.5 million watts or 5% of the total electricity consumption by Google. In 2010, Google Energy made its first investment in a renewable energy project, putting $38.8 million into two wind farms in North Dakota. The company announced the two locations will generate 169.5 megawatts of power, enough to supply 55,000 homes. In February 2010, the Federal Energy Regulatory Commission granted Google an authorization to buy and sell energy at market rates. The corporation exercised this authorization in September 2013 when it announced it would purchase all the electricity produced by the not-yet-built 240-megawatt Happy Hereford wind farm. In July 2010, Google signed an agreement with an Iowa wind farm to buy 114 megawatts of power for 20 years. In December 2016, Google announced that—starting in 2017—it would purchase enough renewable energy to match 100% of the energy usage of its data centers and offices. The commitment will make Google "the world's largest corporate buyer of renewable power, with commitments reaching 2.6 gigawatts