As with all Continentals, the GTC and GTC Speed are flex-fuel capable, which means they can run on gasoline, E-85 biofuel, or a mix of the two.

FORBES: Sneak Peak: Bentley 80-11 Limited Edition Continentals

Ethanol output has more than doubled since 2002, thanks to the development of flex-fuel engines for cars, capable of running on either petrol or ethanol indistinguishably.

ECONOMIST: Energy in Brazil