Communities and power companies throughout the United States are moving away from coal power to avoid devastating climate change and other pollution dangers. Historic owners at Four Corners Power Plant are leaving, including Southern California Edison and El Paso Electric, while BHP Billiton has already sold the mine and will exit in 2016. This leaves Arizona Public Service as the majority owner of Four Corners, shouldering the massive investment required to keep the electricity flowing to Phoenix, and the Navajo Nation taking over ownership of the Navajo Mine, including increased regulatory liabilities for carbon/greenhouse gases, mercury and air toxics, numerous deficient permits and retrofitting the aged Four Corners Power Plant.