| 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. |