text:  Researchers said failing to account for those environmental costs puts both companies and the public at risk. Michael Copley, NPR News. A fire sparked by a major train derailment in North Dakota is almost out. 29 cars from a CPKC train derailed Friday morning. The train was carrying hazardous materials including anhydrous ammonia, methanol, and plastic pellets. Emergency officials say the threat from the fire to anyone living nearby the derailment is now low.