Acid Rain: The Southern Co. (A)

The Southern Co., an electric utility, is planning its compliance with the 1990 amendments to the Clean Air Act. The Act established a system of tradeable permits for sulfur dioxide emissions. The company must decide whether to install pollution control equipment and generate excess permits for sale to other firms, or to emit larger quantities of sulfur dioxide, save capital costs, and purchase pollution permits. Can be used to teach discounted cash flow analysis of a make versus buy decision. Also raises issues of expected cost minimization, questions of economic and political uncertainty, and the value of flexibility.