Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2019

View the Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990–2019 (published 2021), developed by the U.S. Government to meet annual U.S. commitments under the United Nations Framework Convention on Climate Change (UNFCCC).

• 2021 Complete Report (pdf)
  Full, complete Inventory report. Corrected per corrigenda.
• 2021 Upfront (pdf)
  Includes title page, acknowledgements, and preface.
• 2021 Table of Contents (pdf)
  Includes the main inventory document’s table of contents.
• 2021 Executive Summary (pdf)
  Includes data and discussion on the overall estimates and trends in the inventory.
• 2021 Chapter 1: Introduction (pdf)
  Includes background information on how EPA compiles the Inventory and a summary of results for key category and uncertainty analyses.
• 2021 Chapter 2: Trends in Greenhouse Gas Emissions (pdf)
  Includes a synthesis of data on emission and sinks trends over time.
• 2021 Chapter 3: Energy (pdf)
  Includes emissions data related to the energy sector. (corrected per corrigenda).
• 2021 Chapter 4: Industrial Processes and Product Use (pdf)
  Includes emissions data related to the industrial processes product use sector.
• 2021 Chapter 5: Agriculture (pdf)
  Includes emissions data related to the agricultural sector.
• 2021 Chapter 6: Land Use, Land Use Change, and Forestry (pdf)
  Includes emissions and sinks data related to land use, land use change, and forestry.
• 2021 Chapter 7: Waste (pdf)
  Includes emissions data related to the waste sector. (corrected per corrigenda).
• 2021 Chapter 8: Other (pdf)
  Includes information on IPCC’s other sector.
• 2021 Chapter 9: Recalculations and Improvements (pdf)
  Includes the recalculations and improvements discussion comparing the 1990-2018 inventory submissions to the 1990-2019 inventory submission.
• 2021 Chapter 10: References (pdf)
  Includes a list of references used in the main inventory document.
• 2021 All Annexes (pdf)
  Full, complete Annex which contains further information, more detailed explanations of methodologies, more detailed data, and additional information on greenhouse gas emissions and sinks, supplementing the main Inventory document.
• 2021 Annex Introduction and Table of Contents (pdf)
  Includes the table of contents for the Annex.
• 2021 Annex 1: Key Category Analysis (pdf)
  Includes a summary and details on the key category analysis.
• 2021 Annex 2: Methodology and Data for Estimating CO2 Emissions from Fossil Fuel Combustion (pdf)
  Includes further explanation, data, and methodology for emissions related to the energy sector.
• 2021 Annex 3 - Part A: Methodological Descriptions for Additional Source or Sink Categories (pdf)
  Includes further explanation, data, and methodology for source and sink categories other than CO2 from fossil fuel combustion.
• 2021 Annex 3 - Part B: Metholdological Descriptions for Additional Source or Sink Categories (pdf)
  Includes further explanation, data, and methodology for source and sink categories other than CO2 from fossil fuel combustion.
• 2021 Annex 4: IPCC Reference Approach for Estimating CO2 Emissions From Fossil Fuel Combustion (pdf)
  Includes the methodology and more detailed data related to estimating emissions from fossil fuel combustion according to IPCC's Reference Approach.
• 2021 Annex 5: Assessment of the Sources and Sinks of Greenhouse Gas Emissions Not Included (pdf)
  Includes information on greenhouse gas emission sources and sinks which are not included from the Inventory's analysis.
• 2021 Annex 6: Additional Information (pdf)
  Includes additional information including global warming potentials (GWPs), abbreviations, and non-greenhouse gas emissions data.
• 2021 Annex 7: Uncertainty (pdf)
  Includes data and information on the uncertainty analyses run on Inventory source and sink categories as well as the overall uncertainty of the Inventory.
• 2021 Annex 8: QAQC Procedures (pdf)
  Includes information on QA/QC Procedures used in the development of Inventory sources.
• 2021 Expert Review Comment Log (pdf)
  Summary of Expert Review comments and responses.
• 2021 Public Review Comment Log (pdf)
  Summary of Public Review comments and responses
• 2021 Annex 9: Use of EPA Greenhouse Gas Reporting Program in Inventory (pdf)
  Includes information on use of EPA's Greenhouse Gas Reporting Program in the Inventory.
• Corrigenda (pdf)
  Includes documented changes made to the main text and annex documents after the initial publication.