Arizona's biggest energy provider is going coal free by 2031 and carbon free by 2050

One giant energy provider is taking a small chunk of climate change into its own hands.

Arizona Public Service Co., the largest utility provider in Arizona, will swear off coal power by the end of the decade, it announced Wednesday. That's seven years earlier than the company previously pledged, and comes under the purview of a CEO who just took that job in December, AZ Central reports.

As it stands, APS gets 22 percent of its energy from its coal-fired Four Corners Power Plant and Cholla Power Plant. Cholla is slated for closure in 2025, and while Four Corners wasn't supposed to close until 2038, Wednesday's announcement bumped that down to 2031. In addition, CEO Jeff Guldner said Wednesday that APS would completely shift to carbon-free power by 2050. APS does own the largest nuclear power plant in the country, and plans to use that Palo Verde plant to achieve its green energy goals.

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In neighboring New Mexico, where the Four Corners plant is located, utility provider Public Service New Mexico has pledged to go carbon-free by 2040. California and Colorado also have laws that mandate completely carbon-free energy by 2040 and 2045, respectively. More states taking the plunge is essential for minimizing greenhouse gases, seeing as the U.S. is the second biggest emissions producer in the world, and that a full quarter of its emissions come from energy production.