

Kevin Baumert and Nancy Kete with Christiana Figueres
International climate change negotiations are struggling over the basic design and features of
Clean Development Mechanism (CDM), established in the 1997 Kyoto Protocol to the Framework
Convention on Climate Change. Parties and observers elaborate three possible implementation
models, or architectures, for the CDM typically described as bilateral, multilateral, or unilateral.
These approaches differ in fundamental ways and reflect different preferences for the way CDM
investment should take place. Choosing one approach over another will invariably enable some
countries to benefit more than others, and favor some project types over others.
This Note examines the characteristics of the different designs advanced by governments and
observers and explores how an "open architecture" CDM might operate. An open architecture would
allow different designs to complement one another, enabling the CDM to deliver a broader set of
climate and sustainable development benefits. This approach reconciles the apparently conflicting
visions of the CDM and could help forge a consensus in the climate talks.
September 2000 / 20 pages
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