Alternative fuel means electricity, compressed natural gas, propane, ethanol, or any mixture of ethanol containing 85% or more ethanol by volume with gasoline or other fuels. Alternative fuel may also include clean diesel and reformulated gasoline so long as the air quality control commission determines that these other fuels make reductions in carbon monoxide emissions and brown cloud pollutants comparable to the previously mentioned alternative fuels. Alternative fuel does not include any fuel that contains or is treated with methyl tertiary butyl ether.