In this Sept. 8, 2015 photo, a natural gas rig pumps away in the foreground of the coal-fired Huntington Power Plant west of Huntington, Utah. A 20-year plan by Utah's largest electricity provider stipulating that it will not add pollution-control systems to its coal power plants has received criticism from some in the state who say the proposal may violate a U.S. Environmental Protection Agency requirement and get in the way of the federal push to curb regional haze, The Salt Lake Tribune reports. (Al Hartmann/The Salt Lake Tribune via AP)