Acknowledgements This report was produced by the U.S. EPA's Methane Energy Branch in the Office of Air and Radiation, Office of Atmospheric Programs, Climate Protection Division. The report would not have been complete without the efforts and contributions of many individuals and organizations. The following individuals reviewed a preliminary version of this report and provided useful comments, many of which were addressed for this final version. The reviewers included: Peter Carothers (Alternative Energy Development), Tom Conrad (SCS Engineers), Kimberly Denbow (American Gas Association), Lorna Greening (Hagler Bailly Services, Inc.), Matthew R. Harrison (Radian International). William Jewell (Cornell University), Barry L. Kintzer (USDA), Eugene Lee (USEPA), Bob Lott (Gas Research Institute), Richard Mattocks (Environomics), John Reilly (Massachusetts Institute of Technology), Glenda E. Smith (American Petroleum Institute), Pramod C. Thakur (Consol Inc.), Lori Traweek (American Gas Association), Greg Vogt (SCS Engineers), Ann C. Wilkie (University of Florida), and Peter Wright (Cornell University). Although these individuals participated in the review of this analysis, their efforts do not necessarily constitute an endorsement of the report's results or of any U.S. EPA policies and programs. In particular, the Methane Energy Branch staff contributed significantly to the report. They are: Ed Coe, Shelley Cohen, and Brian Guzzone on Landfills; Paul Gunning and Carolyn Henderson on Natural Gas Systems; Karl Schultz and Roger Fernandez on Coal Mining; Kurt Roos on Livestock Manure; Mark Orlic and Tom Wirth on Enteric Fermentation; Bill Irving on Inventories; and Michele Dastin-van Rijn on the preliminary version of the report. Francisco de la Chesnaye directed the final analysis and completion of the report with support from Reid Harvey and oversight from Dina Kruger. The staff of the Global Environmental Issues Group at ICF Consulting deserves special recognition for its expertise, efforts in preparing many of the individual analyses, and for synthesizing this report. 1.2.1 Factors Affecting Methane Emissions from Enteric Fermentation.. 1.2.2 Method for Estimating Current Methane Emissions 1.2.3 Method for Estimating Future Methane Emissions. 1.3 Emission Estimates 1.3.1 Current Emissions and Trends 1.3.2 Future Emissions and Trends. 1.4 Emission Estimate Uncertainty. 2.0 Emission Reductions 2.1 Technologies for Reducing Methane Emissions 6-2 6-2 6-3 6-3 6-4 6-4 6-4 6-5 6-6 6-6 2.2 Achievable Emission Reductions... 2.3 Reduction Estimate Uncertainties and Limitations. 3.0 References. Appendix 1: Supporting Material for Composite Marginal Abatement Curve Appendix III: Supporting Material for the Analysis of Natural Gas Systems Appendix V: Supporting Material for the Analysis of Livestock Manure Management.. |