Alternative Fuel Definition

Alternative fuels are defined as pure methanol, ethanol and other blends of at least 85% alcohol, natural gas, propane, coal-derived liquid fuels, hydrogen, electricity, pure biodiesel, renewable diesel, fuels other than alcohol that are derived from biological materials, and P-series fuels. Biodiesel is defined as mono-alkyl esters of long chain fatty acids derived from vegetable oils or animal fats that meets current ASTM biodiesel standards.

(Reference Wyoming Statutes 39-17-301)