InsideClimate: The smoldering debate over whether coal has a future in a low-carbon world has flared up with new intensity in Warsaw, the site of this month's annual United Nations negotiations [3] toward a global climate treaty. With world coal use growing at a staggering pace, top climate diplomats have used the global stage to take a much more aggressive stance against the coal industry. They are demanding that companies move quickly to leverage technology to capture and bury their planet-heating emissions...