TRAVERSE CITY, MI - Volkswagen's Think Blue Factory in Chattanooga, Tenn., will serve as the blueprint for all new plants worldwide and has become a benchmark for environmental efficiency for all existing plants. This was the key message of Dr. Jan Spies, Volkswagen AG head of factory planning, at the Center for Automotive Research's Management Briefing Seminar in Traverse City, Mich., today. Spies noted…