This report examines four recent detailed studies of countries‘ mitigation pledges under the Cancun Agreements, for the purpose of comparing developed (Annex 1) country pledges to developing (non-Annex 1) country pledges. It finds that there is broad agreement that developing country pledges amount to more mitigation than developed country pledges. That conclusion applies across all four studies and across all their various cases, despite the diversity of assumptions and methodologies employed and the substantial differences in their quantification of the pledges. The studies also find that the Annex 1 pledges could be significantly diminished by several factors, such as lenient accounting rules on the use of surplus allowances, double-counting of offsets, and accounting methodologies for land use, land-use change, and forestry. The studies further note that the mitigation pledged globally is consistent with a global temperature rise of greater than 2°C – and possibly as much as 5°C.
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