ClimateWire: An agreement by Mississippi electric power cooperatives to cost-share 15 percent of Mississippi Power Co.'s $6.2 billion "clean" coal plant in Kemper County has been scuttled after the cooperatives' power purchasing entity decided the power to be delivered from the Kemper plant would be too costly. Cost overruns for the Kemper County Energy Facility, which will use integrated gasification combined cycle technology to convert coal to gas while also capturing a portion of the plant's carbon dioxide...