The UNFCCC Secretariat has published the synthesis and assessment report on the greenhouse gas (GHG) inventories submitted in 2011. The synthesis and assessment is prepared in two parts. Part I provides information to allow comparisons across Annex I parties, as well as descriptions of common methodological issues. Part II provides a preliminary analysis of individual Annex I party inventories. In particular, it identifies outstanding issues requiring clarification during the individual review stage of the process. This synthesis and assessment report contains GHG inventory information compiled in tabular format. The tables provide comparisons of implied emission factors and activity data as reported in the common reporting format (CRF), data from international sources, emissions, information on methods used and emission factors as reported by parties in Summary Table 3 of the CRF, and other information relating to GHG inventory estimates.