Abstract: The U.S. Environmental Protection Agency (EPA), Office of Air and Radiation has produced an emission inventory that identifies and quantifies the U.S. primary anthropogenic sources and sinks of greenhouse gas (GHG) emissions. The data covers anthropogenic emission trends from 1990-2006 and ensures that the U.S. emissions inventory is comparable to the United Nations' Framework Convention on ... Climate Change (FCCC) signatory countries according to methodologies similar to those recommended in the Revised 1996 IPCC (Intergovernmental Panel on Climate Change) Guidelines for National Greenhouse Gas Inventories (IPCC/UNEP/OECD/IEA 1997).
The greenhouse gases in the inventory include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and ozone (O3). Also included are the halocarbons chloroflurocarbons (CFCs) and hydrochloroflurocarbons (HCFCs) and hydroflurocarbons (HFCs), perflurocarbons (PFCs), and sulfur hexafluride (SF6). Emissions of gases that do not directly affect global warming, but are instrumental in the destruction of ozone include: carbon monoxide (CO), oxides of nitrogen (NOx), and nonmethane volatile organic compounds (NMVOCs) as well as aerosols produced by the emissions of sulfur dioxide (SO2). The data in the inventory also includes calculations of global warming potentials (GWPs) that directly or indirectly contribute to the greenhouse effect.
Inventory emissions are determined from the following sources: energy sector (including fossil fuel combustion, cement manufacture, and natural gas flaring), industrial processes, land-use change and forestry, agriculture sector (including methane and nitrous oxide emissions from enteric fermentation in domestic livestock, manure management, soil management, and rice cultivation), waste management activities, and solvent use.