1st generation = food crops turned into either ethanol (means hooch) to be mixed with petrol, or oil to be used in diesel engines. 2nd generation = fuels made from cellulose, allowing use of wood chips, grass, etc. The latter are not yet fully R&D'd.
This is supposing you have understanding arms.
I may steal this for my sig quote. Don't fight forces, use them R. Buckminster Fuller.
