If airlines are allowed to use all available offset credits certified by programmes such as the UN’s Clean Development Mechanism and other voluntary standard bodies under a new global scheme to address international aviation emissions, the scheme will not truly compensate the sector’s growing CO2 emissions. To achieve the aviation scheme’s objective of carbon neutral growth, policy-makers must adopt robust criteria on the types of offset credits that are accepted. The rules should be designed to ensure that the scheme supports the development of new emission reduction projects or targets existing projects that would stop reducing emissions without further financial support. New research outlines the climate implications of various eligibility scenarios for offset credits. Read More
This letter in Nature Climate Change finds that CORSIA will only compensate for the emissions increase of international aviation if robust criteria for the eligibility of offset credits are adopted. Read More
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In this discussion paper we estimate the marginal cost of supplying certified emissions reduction units (CERs) from projects that are currently registered under the Clean Development Mechanism (CDM). We develop a supply curve using data on the individual ability of projects to potentially supply CERs over the period up to 2020. We analyse changes to the supply curve based on a number of scenarios which restrict the eligibility of CERs based on the timing of emission reductions, the timing of project investment decisions and registration under the CDM, as well as an assessment of the extent to which projects are vulnerable to the risk of discontinuing abatement activities without CER revenues. Read More