Earlier this month, the U.S. Department of the Interior did something that just a couple of years ago would have been unthinkable. It permitted a coal mine in Tennessee. New coal mines are being approved around the world despite calls for a ban on the commodity. And this might yet intensify. Last year saw the slowest growth in global coal mine capacity since 2014, energy transition advocacy Global Energy Monitor reported earlier this week. Total new capacity that opened last year stood at 105 million tons, which was a 46% decline from the previous…