Reducing Greenhouse Gases: Improving the Clean Development Mechanism

The Clean Development Mechanism (CDM) is a means for industrial nations, known as Annex 1 countries, to meet their greenhouse gas emissions reductions targets by taking credit for reductions from projects they fund in developing countries. The idea is that projects to reduce emissions will cost less to develop and implement in the developing countries where technology is further behind. Industrialized countries can achieve more reductions via investment in the developing countries, achieving greater emissions reductions for less sunk cost. At least this is the idea under the Kyoto Protocol. A researcher at the Program on Energy and Sustainable Development (PESD), Michael Wara says this, in fact, is not how the CDM is working.

Wara lectures at Stanford Law School, teaching the popular class International Environmental Law. A graduate of Stanford Law School, Wara also has a PhD in Ocean Sciences from the University of California, Santa Cruz. His doctoral work on the interaction between climate change and oceanatmosphere dynamics in the tropics echoes in his current research on the CDM. He understands the science of greenhouse gases and how they affect Earth and its climate. One of those greenhouse gases is HFC-23, a byproduct of manufacturing refrigerants. HFC-23 is one of the gases countries targeted to reduce under the CDM; it can be eliminated rather easily and has been seen as the “low hanging fruit” of the CDM. In fact, more than half the greenhouse gas reductions of CDMs to date have been reached via reducing HFC-23 in developing counties. For the reductions, the project sponsor countries receive credits to put toward meeting their own reductions targets. These credits are called Certified Emission Reductions or CERs.

This is where Wara noticed a big discrepancy between what was credited through the CDM and what was actually happening on the ground. The CERs are not just feel-good pieces of paper that countries collect as proof of their doing good but are certifications of equivalent reductions of one metric tonne CO2 emissions. Carbon is the standardizing greenhouse gas and so regardless of what greenhouse gas is reduced with the CDM the sponsoring country is credited with CERs. But these “carbon credits” have a value—carbon is a traded commodity on many global markets. Wara could directly compare the CDM effect versus the credits issued. Since the cost of implementing the reductions was known or could be calculated, and since the credits were standardized to a greenhouse gas being traded on an open market, Wara could quantitatively critique the CDM.

Wara’s finding showed a major flaw in the CDM design. Looking at the large percentage of greenhouse gas reductions met within the CDM by eliminating HFC-23, the value of the credits created by these reductions were more than four times as valuable as the cost of implementing the reductions. This is not small change, as billions of dollars worth of CERs have been credited for the projects. What is more, the credits for eliminating the HFC-23 byproduct of manufacturing refrigerant were far more valuable than the refrigerant itself, creating incentives to build these manufacturing plants in order to cash-in on the CERs. Exposing these loopholes has brought attention to Wara’s work. He has presented his findings at numerous conferences and published his report (Nature 445, 595-596 (8 February 2007) doi:10.1038/445595a) and derivatives broadly. Wara continues to study the CDM and the global market for greenhouse gases and the post-Kyoto regime for reducing their emissions.