Introduction
This report provides historical and projected estimates of emissions of non-carbon dioxide (non-CO2) greenhouse gases (GHGs) from anthropogenic sources. The report provides a consistent and comprehensive estimate of non-CO2 greenhouse gases for 92 individual countries and eight regions. The analysis provides information that can be used to understand national contributions of GHG emissions, historical progress on reductions, and mitigation opportunities. Although this document is being published by the EPA, the U.S. projections are generated using the same methodologies used for all countries, and is based on IPCC Tier 1 calculations supplemented with country-reported inventory data where available. The dataset compiled for this report is available in spreadsheet (.xls) format on the U.S. EPA's webpage at: http://www.epa.gov/nonco2/econ-inv/international.html.
The gases included in this report are the direct non-CO2 GHGs covered by the United Nations Framework Convention on Climate Change (UNFCCC): methane (CH4), nitrous oxide (N2O), and the Fluorinated Greenhouse Gases (F-GHG). The F-GHGs include hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6). In addition, nitrogen fluoride (NF3) is considered. Compounds covered by the Montreal Protocol are not included in this report, although many of them are also F-GHGs. Historical estimates are reported for 1990, 1995, 2000, and 2005 and projections of emissions are provided for 2010, 2015, 2020, 2025, and 2030. Projections reflect the currently achieved impact of sector-specific climate policy programs, agreements, and measures that are already in place, but exclude GHG reductions due to additional planned activities and economy-wide programs whose impacts on individual sectors are less certain.
To develop estimates included in this report, the U.S. Environmental Protection Agency (EPA) collected emission estimates from publicly available nationally-prepared GHG reports consistent with the Revised 1996 Intergovernmental Panel on Climate Change Guidelines for National Greenhouse Gas Inventories (IPCC Guidelines) (IPCC, 1997), the IPCC Good Practice Guidance and Uncertainty Management in National Greenhouse Gas Inventories (IPCC Good Practice Guidance) (IPCC, 2000), and the Revised 2006 Intergovernmental Panel on Climate Change Guidelines for National Greenhouse Gas Inventories (IPCC Guidelines) (IPCC, 2006). If national estimates were unavailable from nationally-prepared GHG reports, EPA estimated non-CO2 GHG emissions in order to produce a complete global inventory. EPA’s calculated emission estimates are prepared in a consistent manner across all countries using IPCC default methodologies, international statistics for activity data, and the IPCC Tier 1 default emission factors.
This report provides historical and projected estimates of emissions of non-carbon dioxide (non-CO2) greenhouse gases (GHGs) from anthropogenic sources. The report provides a consistent and comprehensive estimate of non-CO2 greenhouse gases for 92 individual countries and eight regions. The analysis provides information that can be used to understand national contributions of GHG emissions, historical progress on reductions, and mitigation opportunities. Although this document is being published by the EPA, the U.S. projections are generated using the same methodologies used for all countries, and is based on IPCC Tier 1 calculations supplemented with country-reported inventory data where available. The dataset compiled for this report is available in spreadsheet (.xls) format on the U.S. EPA's webpage at: http://www.epa.gov/nonco2/econ-inv/international.html.
The gases included in this report are the direct non-CO2 GHGs covered by the United Nations Framework Convention on Climate Change (UNFCCC): methane (CH4), nitrous oxide (N2O), and the Fluorinated Greenhouse Gases (F-GHG). The F-GHGs include hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6). In addition, nitrogen fluoride (NF3) is considered. Compounds covered by the Montreal Protocol are not included in this report, although many of them are also F-GHGs. Historical estimates are reported for 1990, 1995, 2000, and 2005 and projections of emissions are provided for 2010, 2015, 2020, 2025, and 2030. Projections reflect the currently achieved impact of sector-specific climate policy programs, agreements, and measures that are already in place, but exclude GHG reductions due to additional planned activities and economy-wide programs whose impacts on individual sectors are less certain.
To develop estimates included in this report, the U.S. Environmental Protection Agency (EPA) collected emission estimates from publicly available nationally-prepared GHG reports consistent with the Revised 1996 Intergovernmental Panel on Climate Change Guidelines for National Greenhouse Gas Inventories (IPCC Guidelines) (IPCC, 1997), the IPCC Good Practice Guidance and Uncertainty Management in National Greenhouse Gas Inventories (IPCC Good Practice Guidance) (IPCC, 2000), and the Revised 2006 Intergovernmental Panel on Climate Change Guidelines for National Greenhouse Gas Inventories (IPCC Guidelines) (IPCC, 2006). If national estimates were unavailable from nationally-prepared GHG reports, EPA estimated non-CO2 GHG emissions in order to produce a complete global inventory. EPA’s calculated emission estimates are prepared in a consistent manner across all countries using IPCC default methodologies, international statistics for activity data, and the IPCC Tier 1 default emission factors.
