Clean Fuels Table of Contents Introduction Overview Motor Vehicles, Fuels and the 1990 Clean Air Act Ethanol Ethyl Tertiary Butyl Ether Methanol Methyl Tertiary Butyl Ether Biodiesel Gasoline Additives and Combustion Modifiers Electric Vehicles Natural Gas Propane Summary of Regional and State Clean Fuel Policies and Regulations Glossary of Terms Appendix:  1995 Automaker Fuel Recommendations About the Authors For More Information