The use of transferable discharge permits as a water pollution control policy is rapidly increasing in the United States. Drawing on evidence from existing water quality trading programs, this paper provides a taxonomy of the forms that such markets take. Four main structures are identified:...

The author provides an overview of carbon markets and explains how emissions trading can be important in encouraging the reduction of CO2 emissions in an efficient manner. He describes the key steps in establishing a cap-and-trade system, and reviews the European experiences with emissions...