I'm not sure about biofuels myself. It's an interesting idea, essentially using solar energy over time to create fuels, but I think it does need to be managed.
I've heard that the US has more capacity for farming than we use, and either destroy crops to keep prices inflated or don't plant areas. That's a fundamental problem, but it's not easily solved without government managing this somehow. We certainly don't want farmers switching to biofuels and causing shortages.
The world hunger issues are other problems and I have no idea how to solve them. Some of that is developed countries helping others, some of it is the native governments not allowing help, probably other reasons. That's not one I have any idea how to solve.