| Alternative Technology Options |
| Fuel | Comments |
| LPG or LPG /Petrol or CNG or CNG/Petrol | Liquid (Propane) or Compressed Natural gas (Methane) alone or combined with the option to use petrol |
| Ethanol/Methanol with Petrol | Increases oxygen content and so reduces CO and VOC's |
| Biofuels | From sugar cane, oil seeds or other plant material |
| Fuel Cells | New development, opportunity for vast reductions in emissions |
| Electric | Run on electricity stored in batteries |
| Hybrid | Run on a combination of fuel and electricity |