Why Hybrids over just straight Bio-Fuels?

I have watched a few shows discussing the future of cars and most experts on these shows state that Hybrid cars are not perfected yet and by the time they are other more efficient methods will be used in our automobiles. For example Methane or Hydrogen powered cars will probably be the most cost effective solutions in the future. 


I have always been interested in a Bio-fuel car more than a hybrid mainly based on how much money could be saved with a bio-fuel car, Honda has made a Bio-fuel car that runs on Methane that would cost only 1.25 for each gallon of fuel. Methane is also very friendly to the environment by releasing very little Co2 and can be made from from any organic substance, so the supply would be pretty much limitless.


 It is interesting that all this time and money has been put into hybrid cars, when other methods for fueling cars that are way greener and cost effective have actually been successfully implemented. I guess the reason those have not caught on are probably a mixture of Big oil companies using their influence to downplay the effectiveness of this type of fuel, and also the fact that if you bought one you would probably have to produce the fuel yourself with an at home kit and therefore your range would be limited, that is kind of the reason I stopped researching possibly buying one a few years ago, but I def would look into it again once I owned my own home.


 So I guess the point of this train of though is that if I were to choose to invest in a green car, I wouldnt want to choose to invest in a hybrid which has A not been perfected and B not even up to par with biofuel technologies that have been implemented in cars but not caught on for whatever reason. So while the concept of driving a hybrid is good, and if they were to improve them even more so they eventually could be as beneficial for the environment as going vegetarian, the fact that it is a "hybrid" makes me adverse to investing in it as there is still some portion of the automobile that depends on a finite resource that is not only bad for the environment, but costs a grip.


What do you guys think, why have cars that operate on Methane or other Bio-fuels not been as heavily pushed and marketed as Hybrids?


David Doyle