National Greenhouse Gas Emissions Data
Natural Gas Systems
- On November 8, 2013 EPA proposed an update to its methodology in the Inventory of U.S. Greenhouse Gas Emissions and Sinks for hydraulically fractured gas well completions and workovers, and is requesting stakeholder feedback by November 22, 2013. More Information >>
- Overview of Updates to the Natural Gas Sector Emissions Calculations for the Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2011 (PDF) ( 3 pp., 64 KB)
- On February 27, 2013 EPA held a technical webinar on natural gas systems in the Greenhouse Gas Reporting Program (GHGRP) and the Inventory of U.S. Greenhouse Gas Emissions and Sinks (Inventory). View speaker presentations and learn more about the webinar.
- On September 13-14, 2012, EPA held a stakeholder workshop on key aspects of the estimates of greenhouse gas emissions from the natural gas sector in the Inventory of U.S. Greenhouse Gas Emissions and Sinks. View speaker presentations and learn more about the workshop.
EPA develops an annual report called the Inventory of U.S. Greenhouse Gas Emissions and Sinks (Inventory). This report tracks total annual U.S. emissions and removals by source, economic sector, and greenhouse gas going back to 1990. EPA uses national energy data, data on national agricultural activities, and other national statistics to provide a comprehensive accounting of total greenhouse gas emissions for all man-made sources in the United States. EPA also collects greenhouse gas emissions data from individual facilities and suppliers of certain fossil fuels and industrial gases through the Greenhouse Gas Reporting Program. The most recent Inventory report is available for download at the bottom of this page.
The national greenhouse gas inventory is submitted to the United Nations in accordance with the Framework Convention on Climate Change . In preparing the annual emissions inventory report, EPA collaborates with hundreds of experts representing more than a dozen U.S. government agencies, academic institutions, industry associations, consultants and environmental organizations.
DRAFT INVENTORY OF U.S. GREENHOUSE GAS EMISSIONS AND SINKS: 1990-2012
Per an announcement in the Federal Register (FR) [FRL-9907-00-OAR], the draft 1990-2012 Greenhouse Gas Emissions Inventory is now available for public comment. To ensure your comments are considered for the final version of the document, please submit your comments by March 26, 2014. Comments can be sent to Leif Hockstad at email@example.com or Melissa Weitz at firstname.lastname@example.org. How to submit a comment.
Read or download the entire Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2012 (PDF, 529 pp., 14.5 MB). For faster access, individual report sections are posted below, for example the Executive Summary (PDF, 27 pp., 909 KB).
Individual sections of the draft report are also available for download:
Upfront (PDF) (5 pp., 455 KB) - Includes title page, acknowledgments and preface.
Table of Contents (PDF) (17 pp., 550 KB) - Contains the main inventory document's table of contents as well as the list of tables, figures, and boxes.
Executive Summary (PDF) (27 pp., 909 KB) - Provides a broad overview of all U.S. greenhouse gas emission sources and sinks, introduces key concepts and discusses the primary drivers for changes in emissions. All material in the Executive Summary is drawn from the following chapters.
Introduction (PDF) (23 pp., 845 KB) - Includes background information on greenhouse gas emission inventories, an introduction to climate change, a discussion of methodological issues and plans for QA/QC and an uncertainty analysis.
Trends in Greenhouse Gas Emissions (PDF) (33 pp., 1.24 MB) - Provides an overview of emission trends and discusses the primary drivers for changes in emissions.
Energy (PDF) (80 pp., 1.94MB) - Discusses and quantifies energy related emissions of all greenhouse gases resulting from stationary and mobile source activities including fuel combustion and fugitive fuel emissions.
Industrial Processes (PDF) (103 pp., 2.02 MB) - Addresses emissions from industrial processes not directly related to energy activities.
Solvent and Other Product Use (PDF) (5 pp., 597 KB) - Addresses emissions resulting from the use of solvents and evaporative emissions of greenhouse gases arising from other types of product use.
Agriculture (PDF) (42 pp., 1.76 MB) - Addresses anthropogenic emissions from agricultural activities (not including fuel combustion and sewage emissions, which are addressed in the Energy and Waste chapters).
Land Use, Land-Use Change, and Forestry (PDF) (81 pp., 3.38 MB) - Addresses emissions and removals from forest and land-use change activities, primarily carbon dioxide.
Waste (PDF) (31 pp., 859 KB) - Addresses emissions from waste management activities.
Other (PDF) (1 pp., 209 KB) - Addresses emissions from the "Other" IPCC sector.
Recalculations and Improvements (PDF) (6 pp., 515 KB) - Includes an overview of changes in this year's report, including historical data, methodology and other changes relative to the 1990-2011 report.
References (PDF) (65 pp., 963 KB) - Contains the list of references used in the main inventory document.
All Annexes (PDF) (453 pp., 10.6 MB) - Supplementary information, data tables, detailed emission calculations and methodological discussions.
Annex Introduction and TOC (PDF) (1 pp., 240 KB) - Contains the table of contents for the Annex.
Annex 1 (PDF) (26 pp., 1.07 MB) - Key Category Analysis.
Annex 2 (PDF) (97 pp., 2.10 MB) - Methodology and Data for Estimating CO2 Emissions from Fossil Fuel Combustion.
Annex 3 (PDF) (262 pp., 6.80 MB) - Methodological Descriptions for Additional Source or Sink Categories.
Annex 4 (PDF) (10 pp., 403 KB) - IPCC Reference Approach for Estimating CO2 Emissions from Fossil Fuel Combustion.
Annex 5 (PDF) (2 pp., 233 KB) - Assessment of the Sources and Sinks of Greenhouse Gas Emissions Not Included.
Annex 6 (PDF) (23 pp., 673 KB) - Additional Information.
Annex 7 (PDF) (28 pp., 754 KB) - Uncertainty.
Annex 8 (PDF) (4 pp., 358 KB) - QA/QC Procedures.