Alternative Fuels

A popular term for "non-conventional" transportation fuels derived from natural gas (propane, compressed natural gas, methanol, etc.) or biomass materials (ethanol, methanol).

The Energy Policy Act of 1992 defines an alternative fuel as:

• Biodiesel (B100)
• Natural gas and liquid fuels domestically produced from natural gas
• Propane (liquefied petroleum gas)
• Electricity
• Hydrogen
• Blends of 85% or more of methanol, denatured ethanol, and other alcohols with gasoline or other fuels
• Methanol, denatured ethanol, and other alcohols
• Coal-derived, domestically produced liquid fuels
• Fuels (other than alcohol) derived from biological materials
• P-Series fuels
• Anaerobic Digestion
• Anaerobic digestion is series of processes in which microorganisms break down biodegradable material in the absence of oxygen.