This e-book offers a selection of papers presented in Paris, France, in March 2003, at the OECD Global Forum on Sustainable Development: Emissions Trading. The Forum was co-sponsored by the Concerted Action on Tradable Emissions Permits (CATEP). The papers cover the experience of developing and transition countries with greenhouse gas emissions trading and project-based mechanisms and examines the use of tradable permits in policy mixes and harmonization of emissions trading schemes, as well as transition issues relating to greenhouse gas emissions trading markets.