Now, ARE biofuels truly carbon neutral or carbon negative? No.
Wrong. They're carbon neutral, because of the way decomposition works. Only certain types of ecosystems store large amounts of carbon. In biofuels, all of the carbon was removed from the atmosphere by the plants, and will be released either through decomposition, or burning as fuel.
Some people assume that it takes a bunch of gasoline to make biofuel, because they don't realize that you can also use the biofuel to run the factory and transportation equipment.
It is true though that E85 is only 85% carbon neutral. If that is what you meant by "truly" then I admit the non biofuel part of the mix is not carbon neutral, and it still does have that 15%.
However the B99 biodiesel is 99.999%
The anti-biofuel propaganda is funny. For example the WSJ did a story claiming biofuels aren't carbon neutral... because they think you have to clear forests in order to get plant waste! lol
In my state biofuels are big business right now. Most of the restaurant grease is being used. The processed fruit factories have largely gone to selling the "waste" for fuel production. Test factories are converting landscape waste, and corn stalks. We don't have surplus corn production here, so no food corn is diverted to fuel. It is also mostly unsubsidized in this region. I can hardly go a block without a new subaru with a "flex fuel" logo. The only time I see a string of cars without at least one flex fuel logo is when it is all electric hybrids. They're doing trial runs of using kitchen food waste, too. In restaurants to start, but with the plan of having the residential garbage haulers pick up food waste.
By the way, electric cars do have fuel tanks, they're called "batteries." The majority of new cars I see are either electric hybrids, or flex fuel. That is true of all categories, too; SUVs, cars, trucks, whatever. In 15 years most vehicles will either be electric or flex fuel. The old cars will be hybrids.
There is no escaping the fact that flex fuel and electric are both here to stay. Gasoline will be around for a long time too, but most of the cars that run it will be "flex fuel" cars that can also run E85. Real progress is happening, on multiple fronts. There is no silver bullet, and the time when people were waiting around for the perfect solution already passed. The future is here now, and vehicle emissions are starting a downwards trend. Unfortunately, cars are a small part of the carbon problem.