Castro correctly argues that the cost for producing biofuel from food will be paid by the poor people of the world as the third world countries that form the majority of agricultural producers will sell their food crops as fuel. What this implies is, in simple terms, a competition for food between the people of the third world and… cars.
Capitalist repsonse to this was predictable, most spun the story as showing that Castro’s health must be improving without responding to what he said – except to bash him for being a communist, of course. However, he’s right. Growing crops to be used to as fuel cars means others may not have food to eat.
We need cars that get vastly better mileage. That’s the best way to go. Yes, a Hummer can probably run on biofuel, but it will still be a bloated, highly inefficient pig of a car, one that’ll be burning up someone else’s potential meal.