The total U.S. greenhouse gas emissions were about 7,125 million metric tons of CO2 equivalent. Overall, emissions have grown by 17.1 percent from 1990 to 2007. The inventory tracks annual greenhouse gas emissions from 1990 to 2007 at the national level. The gases covered by this inventory include carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride.
The inventory also calculates carbon dioxide emissions that are removed from the atmosphere by “sinks,” e.g., through the uptake of carbon by forests, vegetation, and soils. This annual report is prepared by EPA in collaboration with experts from multiple federal agencies. After responding to public comments, the U.S. government will submit the final inventory report to the Secretariat of the United Nations Framework Convention on Climate Change (UNFCCC).
The report will fulfill the annual requirement of the UNFCCC international treaty, ratified by the United States in 1992, which sets an overall framework for intergovernmental efforts to tackle the challenge posed by climate change. Information on the draft report and how to submit public comments. U.S. Environmental Protection Agency (EPA) Contact: Roxanne Smith, 202-564-4355.