By JONATHAN MATTISE
NASHVILLE, Tenn. (AP) — The nation’s largest public utility plans to shut down a massive coal-fired power plant, but wants to replace it with natural gas. That would put the federal Tennessee Valley Authority out of step with President Joe Biden’s administration goal of a carbon-pollution-free energy sector by 2035. Officials with the utility argue the natural gas move at the Cumberland Fossil Plant in Tennessee would help pave a path toward more renewable sources and away from coal, while continuing to keep rates low and the electric grid reliable. But environmental groups warn the agency could squander the chance to get away from carbon-producing fossil fuels that drive climate change.