When I was a supervisor in the coal mine in 1979, I had one of my most difficult motivating tasks. The mine, Y&O Coal Company, where I worked as a production foreman, had since the mine's inception been a captive mine. A captive mine is one whose coal is consumed by one customer. Long term contracts had linked Cleveland Electric Illuminating (CEI) and Y&O Coal Company for over 10 years. However, the Clean Air Act of 1977 reduced the amount of sulfur that power plants could emit. Therefore, CEI chose to buy Western coal rather than install sulfur scrubbers in their smoke stacks to allow the burning of Southeastern Ohio's high sulfur coal.