BISMARCK, N.D. (AP) — A North Dakota ethanol company is preparing to store its carbon dioxide emissions underground as the state’s coal-fired companies consider following suit. The Bismarck Tribune reported Tuesday that Red Trail Energy, which converts corn into ethanol fuel at its plant in Stark County, plans to drill a test well on its property within the next few months.  Red Trail was given key approval last week on its carbon capture and storage project from North Dakota’s Industrial Commission. The company’s injection well would be the first the state permits since it assumed oversight of such facilities from the U.S. Environmental Protection Agency last year.