Clean Fuels:  Diverse, Clean and Low Carbon 

The fuel used to power vehicles has a big impact on emissions, energy security and climate change. Therefore, clean fuels must address all three of these criteria. It is likely a poly-fuel rather than a single oil-based fuel future is what we will see, including fuels such as:

• Natural gas
    o Liquefied (LNG); Compressed (CNG)
    o Hydrogen blended NG (HCNG)
    o Renewable methane (biogas, biomethane)

• Biofuels 
    o Biodiesel and renewable diesel 
    o Alcohol fuels 
        • Ethanol, Butanol 
        • Methanol, includes cellulosic alcohol 
    o Advanced biofuels (Includes new sources and methods of production) 
        • Waste biomass 
        • Algae-based biofuels 
        • Synthetic biology and novel catalysts 
        • New energy crops

• Synthetic fuels and Dimethylether 
    o Fisher-Tropsch liquids (Gas-to-liquids, Biomass-to-liquids) 
    o Dimethylether (DME)

• Propane
• Hydrogen
• Electricity