| 1-F. Clean fuel. "Clean fuel" means all products or energy |
sources used to propel motor vehicles, as defined in Title 29-A, |
section 101, other than conventional gasoline, diesel or |
reformulated gasoline, that, when compared to conventional |
gasoline, diesel or reformulated gasoline, results result in |
lower emissions of oxides of nitrogen, volatile organic |
compounds, carbon monoxide or particulates or any combination of |
these. "Clean fuel" includes, but is not limited to, compressed |
natural gas; liquefied natural gas; liquefied petroleum gas; |
hydrogen; hythane, which is a combination of compressed natural |
gas and hydrogen; dynamic flywheels; solar energy; alcohol fuels |
containing not less than 85% alcohol by volume; and electricity. |