Associated Press: Five coal-fired power plants in the U.S. and Canada, including one in central North Dakota, are studying the feasibility of retrofits to capture and store carbon dioxide, a nonprofit industry research group says. Electric Power Research Institute said studies are being done at Great River Energy’s Coal Creek Station near Underwood, and at plants in Illinois, Utah, Ohio and Nova Scotia. The group said the research could help guide development of future power plants and how they deal …