Complex sentence: Kingsport is the home of Tennessee's largest single industrial employer is Eastman Chemical Company (approximately 7,500 employees in 2006), formerly the chemical division of Kodak, and the Aluminum Company of America, now Alcoa.
Split into simpler sentences: Kingsport is the home of Tennessee's largest single industrial employer, Eastman Chemical Company (approximately 7,500 employees in 2006). East Tennessee is also home to the Aluminum Company of America, now Alcoa.