3.1  Introduction

• The description “Alternative fuels” used in this section refers to sources of energy, other than petrol and standard diesel, that can be utilised to power a vehicle and which are derived from renewable or sustainable sources.
  
  
• Alternative fuels that can be used to power a vehice fall into three main catagories: Biofuels, Hydrogen and Natural Gas.
  
  
• Note: No fuel other than that recommended by the manufacturer should be used in a vehicle.
  
  
• To explore this subject in greater depth please see Green Cars, Section 10 (Green Web Site Links).