Trends in global CO2 and total greenhouse gas emissions: 2021 Summary Report

For F-gases in this report, we used the new EDGAR v6.0 data set that covers the 1970–2018 period, for which mostly other data sources were used for the main sources of HFC and PFC emissions than in the previous version: for the 1990–2018 period, the new data set contains extensive data on emissions on the most important F-gases and sources reported annually by the so-called Annex-I countries (indu. [...] Section 2.2 discusses the global total GHG emissions and subsequent sections describe the global trend in each of the main greenhouse gases, with a focus on the group of non-CO2 greenhouse gases and the recent global trends in key drivers of these emissions (i.e. [...] PBL | 13 2 Trends in global emissions 2.1 Introduction Our analysis of recent global GHG emissions focuses on the identification of key trends and the main direct drivers that determine the changes in the quantity of CO2, CH4 and N2O emissions, both globally and for the five largest emitting countries and the European Union as a whole. [...] Note that due to the large diversity of the emission factors within these sources, and the lack of global statistics for F-gas production and their uses, the levels and annual trends in the emission of CH4, N2O and F-gases are much more uncertain than those in CO2. [...] We recall that our best estimate for the change in global total methane emissions in 2020 including the impact of the COVID-19 recession is -0.7% (Table 2.2),and when also including the IEA estimate of the change of global emissions from oil and gas systems of -8% in 2020 (IEA, 2021a), this would result in a total global decline of 1.9%.