How credible are the results generated by WARM?
WARM has been in development for over 10 years and relies on information from leading scientists and technical experts. The methodology and data has been peer reviewed at several stages; some of the peer review processes are detailed in Background Document C: Review Process for the Report. A lengthier review process including public comments and responses is detailed in Background Document D: Comment-Response Document. The field of life-cycle analysis has expanded dramatically since WARM was originally developed and interest in life cycle studies and supply chain impacts is at an all-time high. For that reason, EPA is in the process of updating many of the emission factors and assumptions embedded in WARM. As new updates and improvements become available, EPA will post new versions of the model and explanations of revisions. To learn more about the data sources and methodology employed in WARM, please consult the latest edition of EPA’s research report: Solid Waste Management and Green
