There is growing interest in the development of tools and methods for calculating the supply chain "carbon footprint" associated with products and services. However, relatively little attention has been paid to the development of models that allow policy makers and environmental analysts to assess realistic opportunities for reducing such carbon footprints. This presentation will first provide an overview of market and policy drivers of emerging carbon footprint initiatives, and the current methods used for estimating such footprints. Next, a supply chain energy use and GHG emissions model will be presented, which characterizes the key underlying technologies and processes that contribute to the carbon footprints of a variety products and services. The approach allows for both environmental and economic assessment of discrete supply chain technology and process improvements, which can help lead to targeted and better-informed supply chain energy efficiency and GHG mitigation strategies. The presentation will conclude with a discussion of research challenges and opportunities in the nascent field of supply chain energy and GHG emissions minimization modeling. Hosted by: William J. Fisk, Mail Stop 90R3058, LBNL, 486-5910, WJFisk@lbl.gov and Professor Tarek Zohdi, 6117 Etcheverry, UC Berkeley, 642-9172, zohdi@me.berkeley.edu