1. National Renewable Energy Laboratory, The American Farm: Harnessing the Sun to Fuel the World, NREL/SP-420-5877, DE94000217 (Golden, CO, March 1994).

2. "Neat" refers to the pure, undiluted form of a mixture.

3. Alternative Fuels Data Center, "Auto Manufacturers Offer a Variety of AFVs in MY 1995," AFDC Update (February 1995), p. 6.

4. Namely, tertiary butyl alcohol (TBA), isopropyl alcohol (IPA), and ethyl tertiary butyl ether (ETBE).

5. EPA regulations do not permit the use of ethanol as an oxygenate in RFG because the Reid vapor pressure of gasoline/ethanol blends exceeds allowable limits. Reid vapor pressure is a measure of fuel volatility, which is a factor in ozone pollution.

6. U.S. Department of Agriculture, Economic Research Service, Industrial Uses of Agricultural Materials, IUS-4 (Washington, DC, December 1994), p. 8.