FIGURE 1 Volume changes over time.

FIGURE 1 Volume changes over time.

Source: U.S. Environmental Protection Agency, Office of Transportation and Air Quality, Workshop Presentation by Bruce Rodan, June 23, 2009.

with separate volume requirements for cellulosic biofuels, biomass-based diesel, advanced biofuels,1 and total renewable fuels.

  • Modifies the definition of renewable fuels to include minimum life-cycle GHG reduction thresholds. These reductions are to include both direct emissions and indirect emissions resulting from significant land-use changes—including international land-use changes.

  • Restricts the types of feedstocks that can be used to make renewable fuels and the types of land that can be used to grow feedstocks.

  • Includes specific waivers and U.S. Environmental Protection Agency (EPA)-generated credits for cellulosic biofuels.

While EISA has a number of sustainability provisions, it “grandfathers” the first 15 billion gallons/year of biofuel, exempting this amount of fuel from


EISA defines advanced biofuels as renewable fuels, other than ethanol derived from corn starch that has lifecycle greenhouse gas emissions that achieve at least a 50 percent reduction over baseline lifecycle greenhouse gas emissions. Types of advanced biofuels include: ethanol derived from cellulose or lignin, sugar or starch (other than corn starch), or waste material, including crop residue, other vegetative waste material, animal waste, and food waste and yard waste; biomass-based diesel; biogas produced through the conversion of organic matter from renewable biomass; butanol or other alcohols produced through the conversion of organic matter from renewable biomass; and other fuel derived from cellulosic biomass

The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement