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The report provides information on recent efforts to use the Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation (GREET) fuel-cycle model to estimate air toxics emissions. GREET currently addresses greenhouse gas emissions and such regulated emissions as volatile organic compounds, nitrogen oxides, and carbon monoxide. This study is significant because it is the first to consider fuel-cycle emissions of these pollutants for alternative transportation fuels. For this study, we evaluated air toxics emissions of the following fuels and vehicle technologies: conventional gasoline, conventional diesel, federal reformulated gasoline, California reformulated gasoline, compressed natural gas, liquefied natural gas, methanol, ethanol, battery-powered electric vehicles, and hybrid electric vehicles.

Fuel-cycle emissions for conventional and alternative fuel vehicles : an assessment of air toxics.