Sustainable Transportation Energy Pathways (STEPS)
Yeh, Sonia, Mark A. Delucchi, Alissa Kendall, Julie Witcover, Peter W. Tittmann, Eric Winford (2011) "Key Measurement Uncertainties for Biofuel Policy" chapter 12 in Sustainable Transportation Energy Pathways: A Research Summary for Decision Makers. Institute of Transportation Studies, University of California, Davis, 263 - 277
different times equally, an accounting of the climate impacts of GHG emissions should consider the effect of emissions over time. Second, there is a need to account for non-GHG global warming factors such as albedo, and the effect of non-Kyoto gases and pollutants such as aerosols and black carbon. Third, more work needs to be done on the question of how to account for indirect land-use effects, which can be large for crop-based feedstocks. And fourth, when forest wastes are used as feedstock for biofuel production, the impacts on forest systems, especially changes in the fire behaviors, forest sinks, soil emissions, and other forest carbon pools should be considered. The last two uncertainties relate to what are often called the leakage and indirect effects that occur when there are dynamic linkages between different carbon pools.